Check the solution against a primary standard.
对照原来的标准液来检验此溶液。
The national primary standard of combustion heat was completely improved.
对国家燃烧热基准进行了全面改造。
Primary standard — an ambient air pollution standard designed to protect human health.
基本标准——一个旨在保护人类健康的周围空气污染级别。
Deadweight testers are the basic primary standard for accurate measurement of pressure.
自重测试仪是基本的测量压力设备。
The international primary standard for the kilogram is made of 90% platinum, 10% iridium.
重量和长度的国际标准原型用90%的铂，10%的铱制成。
National primary energy production reached 1.34 billion tons of standard coal.
一级能源生产达到13.4亿吨标准煤。
It is "primary level" standard.
一是“初级阶段”标准。
It is "primary level" standard.
一是“初级阶段”标准。
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