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Do you always put a quality mark on each container?
每个包装箱上也有品质标志 吧 ?
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Calculate according to the experiment please the vitriolic solute quality mark in this sewage.
请根据实验计算该污水中硫酸的溶质质量分数.
Choosing Shanghai Jiujing antiseptic product the corresponding specification and corresponding quality mark according to the usage.
根据预定用途选择相应规格及具有相应品质标记的上海久景防腐材产品.
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