Dab tsi yog Cov Txheej Txheem Ua Haujlwm ntawm Nickel Rods?

Dab tsi yog cov qauv siv ntawm nickel rods?
Lub teb chaws tus qauv: GB / T 4435-1984
American txuj: ASTM B160

Metallurgical Silicon Feedstock

Nickel square pas nrig