CNC Process Precise Hydraulic Cylinder Parts 1)ISO9001:2008 certificated 2) ... all kinds of precision machinery parts,especially the hydraulic,valve and automobile parts.The accuracy is up ... 32 microinch.We are a factory,specialized in hydraulic,valve and automobile parts.The parts we manufacturing ... customize some parts,especially valve parts,hydraulic parts,automobile parts,etc,welcome to Bowei.