软件开发模板

Under normal use, O-rings generally do not twist or roll under reciprocating motion, because the contact area between the rubber O-ring and the groove is larger than the frictional contact area on ...

1. NBR nitrile rubber sealing ringIt is suitable for use in petroleum-based hydraulic oil, glycol-based hydraulic oil, diester lubricating oil, gasoline, water, silicone grease, silicone oil and ot...