Conformance to a particular material classification in this standard requires meeting a number of minimum physical and chemical properties.

要符合这个标准下的特殊材料分类，需要满足一系列最低物理和化学性能要求。

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To treat the produced water from oilfields to meet the injection water quality standard, the physical technology and the chemical technology are often applied.

对油田采出污水进行处理以达到注入水水质标准，通常采用物理处理技术和化学处理技术。

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The sampling constants can be estimated by means of sampling relative standard deviation or some relevant chemical and physical informations.

首先对被分析物料实验测定取样标准偏差，或进行一些有关的化学测试和物理测试，以确定取样常数。

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