This standard specifies terms and definitions, classification and marking, requirement, test methods, inspection rules, sign, transport and storage of talc lumps. This standard is applicable to the natural output of block (grain) tale lumps products. This standard does not apply to block products of tale lumps such as talc slate pencil, talc board, tale bricks, talc carving material and so on.
以下为对购买帮助不大的评价