sucker rod coupling is made according to API, and the surface hardness is HRC50-65, the basic hardness is HRC16-23, it has three functions: wear-proof, corrosion-resisting and reducting the friction.
JIASHAN LISAN METAL PRODUCT CO., LTD, founded in April 2006, has great transportation advantages due to its locality_ not far from shanghai in the east, close to shanghai-hangzhou expressway in the....
API sucker rod coupling has three functions: wear-proof, corrosion-resisting and reducing the friction, the raw material is good quality steel alloy, guochuijie( at) hotmail.com
sucker rod coupling is made according to API , and the raw material is good steel alloy 40cr, it has three functions: wear-proof, corrosion-resisting and reducing the frictiong.msn: guochuijie( at....