characteristic and usage 特点和用法
Introduces the operating principle, the product structure characteristic of brushless rheostat starter and usage state in the Bailong coal mine preparation plant.
介绍了无刷变阻起动器的工作原理、产品结构特征，以及在白龙矿洗煤厂的使用情况。
This paper described the function and basic demand of koji making materials, characteristic and requirement of usage of general materials and so on.
该文叙述了制曲原料的基本要求、作用，常用制曲原料的特性等。
In this paper, the synthesis, structure, characteristic and usage of nylon 46 is introduced.
本文介绍了尼龙46的合成，结构、特性与用途。
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