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Work-piece: Valve
Material: CuZn40pd2
Work-piece: Valve
Material: CuZn40pd2
Work-piece: Ball bearing
Material: SUJ-2
Hardness: HRC56-60
工件: 後球銷
材質: SCM435
硬度: HRC32.5-38
工件: 後球銷
材質: SCM435
硬度: HRC32.5-38
工件: 柱塞
材質: 38CrMoA1A
硬度: HRC62