A.1100 B.1200 C.1400 D.1600-1700
A.避免雨淋對存放環(huán)境無要求 B.與其他工業(yè)鹽類混放 C.存放處便于取放 D.存放處在通風干燥的庫房內
A.一級品純度≧96% B.一級品純度≧97% C.一級品純度≧98% D.一級品純度≧98.5%