?? ??: ???

alloy tool steel ?? ?? ?? aluminium alloy ???? ???

bearing alloy ??? ?? blister steel ???

bondeerized steel sheet ?? ?? carbon tool steel

clad sheet ???

?? ??

forging die steel ?? ?? ?? ???zed steel sheet ?? ??

hard alloy steel ????? ?? sped tool steel ?? ???

hot work die steel ?? ?? ??? alloy tool steel ?? ???

low manganese casting steel ????? marging steel ?? ???

martrix alloy ???? ?? meehanite cast iron ??? ??

meehanite metal m ??? merchant iron ??? ??

molybdenum high sped steel ????

?ckel chromium steel ?? ?? ??

silicon steel sheet ?? ?? stinless steel ??????

tin plated steel sheet ?? ?? tough pitch copppper ??

troostite ?? ?? tungsten steel?

vinyl tapped steel sheet ???? ????