中国 · 品目· 1 个子目· 0 个税号
3818电子工业用掺杂化学元素及化合物
Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics
Chemical elements doped for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in electronics