【运输】金属加工、电器化学的

metal straddling dowel

earth engenders metal

heavy non-ferrous metal alloy【材】

shielded inert-gas metal arc welding

A-metal【材】

borides, carbides, nitrides, oxides, silicides as hard metal of more than 50% by weight

metal ultrahigh vaccum argon analyzer

sheathing metal wire with caoutchouc