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China Factory 42CrMo 42CrMo4 Precision Linear Shaft Steel Shaft Linear Bearing Axis Hard Chrome Plated Stainless Steel Piston Rod, Find Details and Price about 42CrMo 42CrMo4 Precision Linear Shaft Linear Hard Chrome Plated Shaft from China Factory 42CrMo 42CrMo4 Precision Linear Shaft Steel Shaft Linear Bearing Axis Hard Chrome Plated Stainless Steel Piston Rod - Ningbo Huaxun Special Machinery Co., Ltd.