Familiar with raw material selection, mold design, molding process.

熟悉原材料选择，模具设计，注塑工艺。

youdao

This paper introduce the raw material selection, furnace parameters and operating method for smelting metal silicon in chemical use.

本文介绍了化学用硅需要的原料选择、设备的工艺参数及冶炼操作方法。

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In this paper, raw material selection, formulation, and processing technology of plastisol for foamed bottle-cap liner were introduced.

本文介绍了瓶盖内衬专用发泡增塑糊的生产，原材料选择及配方设计，以及加工工艺。

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Recent studies show that there is substantial standing genetic variation in natural populations of planktonic organisms, which provides the raw material for natural selection.

UNESCO: THEMES