Ningbo Yinzhou Boshenghai Machinery Co., Ltd.
Cold Forging Parts
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AISI 4130 alloy steel cold forging ball valve parts -
Cold forming cnc machining sleeve spline coupling,free cutting steel -
Steel parts of hydraulic cylinder for tractor,produce according drawings -
Cold forging process,cnc machining precise OEM auto parts in Zhejiang Ningbo -
Precision machined forged tractor trailer parts,contract manufacturing