✖

Home

Stock Categories

Quality Control

Hydraulic pump and pump parts

Relief valve and other valve

excavator

Home>Products>Kawasaki pump>Sumitomo A1 A2 excavator computer controller KHR1885 SH210A1 A2 KHR-1794 KHR1794 Sumitomo Computer Board

Sumitomo A1 A2 excavator computer controller KHR1885 SH210A1 A2 KHR-1794 KHR1794 Sumitomo Computer Board MODELS

Need a CAD or 3D Model?

Contact Now WhatsApp Be Our Agent

Sumitomo A1 A2 excavator computer controller KHR1885 SH210A1 A2 KHR-1794 KHR1794 Sumitomo Computer Board

Sumitomo A1 A2 excavator computer controller KHR1885 SH210A1 A2 KHR-1794 KHR1794 Sumitomo Computer Board SPECIFICATIONS

Min.Order Quantity:Negotiation
Price:Negotiation

TOKIMEC VANE PUMP LTD

SunnyChina

Sunny2020-07-10 09:46:19
Welcome to my shop! Glad to serve you! Please send your question!

Interested In: Price Inspection Certificate Product Specifications Company Profile

Sumitomo A1 A2 excavator computer controller KHR1885 SH210A1 A2 KHR-1794 KHR1794 Sumitomo Computer Board Technical information

Minor Diameter [Max:0.875 in
Cover End Pressure [Max:Straight w/ Key
Manufacturer Part No.:V2010
Cover End RPM [Max:2 5/16 in
Pump Series:Double
Port Size:Buna-N
Minor Diameter:3000
Pressure Port Size, Cover End:N/A
Controlled Flow Rate:SAE B, 2 Bolt
Major Diameter [Min:Single Shaft Seal
GPM @ 1,800 rpm, Shaft End:N/A
Pilot Type:3000
Mounting:3000
GPM @ 1,800 rpm, Cover End:N/A
Integral Valve Configuration:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm
Shaft Length:N/A
Weight:N/A
Rotation:N/A
Relief Valve Setting:N/A
Port Type:N/A
Port Orientation - Cover End:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm
Shaft End RPM [Max:V2010-1F7S3S-1CC12
Model No.:2500
Shaft Type:2500
Shaft Dia.:4.5
Spline Description:10.5
Displacement Shaft End (cu in/revolution):1.4
Mounting Flange:Outlet 45° CW from Inlet
Pressure Port Size, Shaft End:Outlet Inline w/Inlet
Port Orientation - Shaft End:1/2 in SAE O-Ring
Minor Diameter [Min:3/4 in SAE O-Ring
Seal Material:0.6

Sumitomo A1 A2 excavator computer controller KHR1885 SH210A1 A2 KHR-1794 KHR1794 Sumitomo Computer Board Products and services

Vio27 travel motor B27,B3,B50,B37,B32,YB351,YB30,VIO30,final drive,VIO75,VIO55,VIO80,VIO40,VIO45,VIO25,VIO50,VIO60,VIO65,B6U	Seal Material:30.0 LB; Pump Series:Flange Mount; Port Size:Right Hand (CW); Displacement Cover End (cu in/revolution):V2010-1F7S3S-1CC12; Minor Diameter [Max:1.5; Cover End Flow @ RPM:Flange; Port Orientation - Shaft End:3/16 in; Cover End Pressure [Max:N/A; Shaft Type:0.875 in; Shaft End Pressure [Max:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
ZX75 final drive,ZX50 travel motor,ZX55,ZX40,EX45,ZX50-2,EX50,ZX30,EX35,ZX90,EX40,ZX35,ZX70,EX55,EX60,track motor,pump,	Controlled Flow Rate:30.0 LB; Integral Valve Configuration:Flange Mount; Pressure Port Size, Shaft End:Right Hand (CW); Cover End Pressure [Max:V2010-1F7S3S-1CC12; Shaft End Pressure [Max:1.5; Shaft End Flow @ RPM:Flange; Port Size:3/16 in; Shaft Type:N/A; Model No.:0.875 in; Pump Series:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
EXCAVATOR 450mm,500CHAIN ON RUBBER TRACK PAD,400MM,600mm,Doosan,Daewoo,Hyundai,Kobelco,Volvo,Sumitomo,Kubota,	Manufacturer Part No.:30.0 LB; Cover End Pressure [Max:Flange Mount; Cover End Flow @ RPM:Right Hand (CW); Pressure Port Size, Cover End:V2010-1F7S3S-1CC12; Integral Valve Configuration:1.5; Seal Material:Flange; Major Diameter [Min:3/16 in; Relief Valve Setting:N/A; Mounting Flange:0.875 in; Pressure Port Size, Shaft End:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
EX40 Mini Excavator Final Drive and Track Travel Motor Complete Unit Replaces P/N. 4390493 Nachi PHW-500N-50-SR-16630	Cover End RPM [Max:30.0 LB; Relief Valve Setting:Flange Mount; Manufacturer Part No.:Right Hand (CW); Port Orientation - Shaft End:V2010-1F7S3S-1CC12; Shaft Dia.:1.5; GPM @ 1,800 rpm, Shaft End:Flange; Minor Diameter [Max:3/16 in; Model No.:N/A; Pump Series:0.875 in; Pilot Type:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
excavator crawler assembly for Kobelco,Daewoo,Volvo,Kubota,Sumitomo,Hyundai,Kato,Doosan	Shaft End Flow @ RPM:30.0 LB; Seal Material:Flange Mount; Minor Diameter:Right Hand (CW); Shaft Length:V2010-1F7S3S-1CC12; Rotation:1.5; Relief Valve Setting:Flange; Minor Diameter [Max:3/16 in; Manufacturer Part No.:N/A; Port Orientation - Cover End:0.875 in; Cover End RPM [Max:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
Excavator hydraulic travel motor,Hyundai,Daewoo,Doosan,Sumitomo,JMV-23/21,JMV-44/22,JMV-47/27,JMV-53/34,JMV-53/31,JMV-76/45	Max. RPM [Max:30.0 LB; Pilot Type:Flange Mount; Controlled Flow Rate:Right Hand (CW); Minor Diameter [Max:V2010-1F7S3S-1CC12; Shaft Key:1.5; Shaft End Flow @ RPM:Flange; Port Orientation - Cover End:3/16 in; Weight:N/A; Relief Valve Setting:0.875 in; Shaft Length:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
excavator water pump 4tne88,engine part,piston,ring,connecting rod,4D84-3,4TNE94,4TNV94L,4TNV98,4TNE98,4D88,4TNV88	Manufacturer Part No.:30.0 LB; Shaft Length:Flange Mount; Shaft Dia.:Right Hand (CW); Model No.:V2010-1F7S3S-1CC12; Cover End RPM [Max:1.5; Minor Diameter [Min:Flange; Weight:3/16 in; Shaft Key:N/A; Minor Diameter [Max:0.875 in; GPM @ 1,800 rpm, Shaft End:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
Volvo EC360 main pump,EC240 excavator hydraulic pump:EC330,EC210,EC320,EC260,EC300,EC350,EC280,EC290,EC420,EC110,EC120,EC160,	Weight:30.0 LB; Port Size:Flange Mount; Cover End RPM [Max:Right Hand (CW); Shaft End Flow @ RPM:V2010-1F7S3S-1CC12; Rotation:1.5; Displacement Shaft End (cu in/revolution):Flange; Mounting Flange:3/16 in; Minor Diameter:N/A; Pressure Port Size, Shaft End:0.875 in; Shaft Key:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
Kobelco hydraulic oil pump,SK250-6E,SK160,SK230-6 excavator main pump,Kawasaki,K3V112DT,K3V180DTP,SK330,SK380,SK200,SK280	Port Size:30.0 LB; Model No.:Flange Mount; Minor Diameter [Max:Right Hand (CW); Shaft End Pressure [Max:V2010-1F7S3S-1CC12; Displacement Shaft End (cu in/revolution):1.5; Minor Diameter:Flange; Shaft Key:3/16 in; Controlled Flow Rate:N/A; Port Orientation - Shaft End:0.875 in; Pump Series:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;
takeuchi TB145,TB70,TB175 excavator hydraulic pump,,TB80FR,TB35,TB65,TB45,AP2D28VL,AP2D28,AP2D25,AP2D36,AP2D25VL	GPM @ 1,800 rpm, Shaft End:30.0 LB; Major Diameter [Max:Flange Mount; Displacement Shaft End (cu in/revolution):Right Hand (CW); Shaft End Pressure [Max:V2010-1F7S3S-1CC12; Port Orientation - Shaft End:1.5; Pressure Port Size, Shaft End:Flange; Port Orientation - Cover End:3/16 in; Port Size:N/A; Model No.:0.875 in; Shaft Length:Straight w/ Key; Pump Series:V2010; Shaft Length:2 5/16 in; Configuration:Double; Seal Material:Buna-N; Max. RPM [Max:3000; Minor Diameter:N/A; Mounting Flange:SAE B, 2 Bolt; Shaft Seal Type:Single Shaft Seal; Spline Description:N/A; Cover End RPM [Max:3000; Shaft End RPM [Max:3000; Controlled Flow Rate:N/A; Cover End Flow @ RPM:3 gal/min @ 1200 rpm, 4.5 gal/min @ 1800 rpm; Major Diameter [Max:N/A; Major Diameter [Min:N/A; Minor Diameter [Max:N/A; Minor Diameter [Min:N/A; Relief Valve Setting:N/A; Shaft End Flow @ RPM:7 gal/min @ 1200 rpm, 10.5 gal/min @ 1800 rpm; Manufacturer Part No.:V2010-1F7S3S-1CC12; Cover End Pressure [Max:2500; Shaft End Pressure [Max:2500; GPM @ 1,800 rpm, Cover End:4.5; GPM @ 1,800 rpm, Shaft End:10.5; Integral Valve Configuration:N/A; Port Orientation - Cover End:Outlet 45° CW from Inlet; Port Orientation - Shaft End:Outlet Inline w/Inlet; Pressure Port Size, Cover End:1/2 in SAE O-Ring; Pressure Port Size, Shaft End:3/4 in SAE O-Ring; Displacement Cover End (cu in/revolution):0.6; Displacement Shaft End (cu in/revolution):1.4;

Sumitomo A1 A2 excavator computer controller KHR1885 SH210A1 A2 KHR-1794 KHR1794 Sumitomo Computer Board Video

hydraulic piston, vickers hydraulics, rexroth hydraulic,hydraulic cylinder repair

Contact Us

TOKIMEC VANE PUMP LTD: Emailsales3@boya.com.sg; AddressBeiyuan District, Jinan，Shandong; Phone(Working Time)0531-8299 9953; Fax0531 -82990352

Send Now

Sumitomo A1 A2 excavator computer controller KHR1885 SH210A1 A2 KHR-1794 KHR1794 Sumitomo Computer Board Technical Articles

Ceramic Bearing Classification and advantages Reference

All ceramic bearings are resistant to magnetic and electrical insulation, wear and corrosion resistance, oil-free self-lubricating, high temperature and high temperature resistance, and can be used in extremely harsh environments and special working...

NSK high speed precision bearing installation attention reference

High-speed precision bearings are mainly used for high-speed rotating applications with light loads. High-precision bearings, high-speed, low-temperature vibration and a certain service life are required. The support members of the high-speed electric...

YCB arc Gear Pump

I. Overview and characteristics of YCB arc gear pump: YCB arc gear pump adopts the most advanced point contact gear which is considered to be the most advanced pump in the world, that is, the double arc plus sinusoidal curve is combined into a tooth...