A.鉑坩堝 B.鎳坩堝 C.鐵坩堝 D.石英坩堝
A.1~10% B.0.1~1% C.<0.01% D.<0.001%
A.24.737±0.001(%) B.24.737±0.010(%) C.24.737±0.100(%) D.24.737±1.000(%)