... , stainless steel, carbon steel,alloy steel,brass,nylon,plastic etc. 3.Processing: Forged,casting, die casting,investment ... and the plastic painted, black of Oxidation,and so on.5.Heat treatment: Carburizing and quenching,hardening and tempering,high frequency quenching,and ... Co.,LtdContact personBin NingPhone86-022-58269136Fax86-022-87865326Product name Bearing,Sprocket,Chain,Gear,Gear Rock,Power Lock ...