Laboratory glassware—Hydrometer for general purpose—Part 2:Test methods and use
IDT ISO 649-2:1981
全国危险化学品管理标准化技术委员会(SAC/TC 251)
本部分规定了通用型密度计的试验方法和使用。 ISO 649的第１部分提供了通用型密度比重计的规程。
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