... quality hydraulic system 3,over 50,000 open-close SGS test Type:stainless steel hydraulic hingestainless steel SUS304.SUS201ITEM NO.:HBS01Opening ... passed the SGS test1.Passed 75 pounds load test.2.Passed over 50,000 open-close test.3.Passed salt and mist for ... oil,rustproof more efficiently6, Certification : SGS, ISO 9001:20007, GS test:l Passed 75 pounds loadl Passed over 50,000 pen ...