介绍了金属加工液的分类，组成和性能。
It is introduced the classification, composition and properties of metalworking fluids.
研究了碱矿渣水泥-赤泥基轻质隔墙板的组成和性能。
The article explores the composition and property of alkali slag cement-red soil base light wall partition.
本文介绍了新研制的483系列分配阀的结构组成和性能特点。
In this paper, the structural composition and performance features of the newly developed 483 series distributions valves are described.
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