A、0.5MPa B、0.4MPa C、0.3MPa D、0.6MPa
A、鍍鎘 B、鍍鉻 C、鍍鋅 D、減小壁厚
A、0.21~0.362mm B、0.41~0.562mm C、0.31~0.462mm D、0.51~0.602mm