This paper introduces checkup project, frequency and main quality control project for road common material. It also states how to effectively control the raw material quality by prevention measure.

介绍了公路常用材料的检验项目，频率和主要质量控制项目，通过预防，采取措施，达到监控为目的，有效地控制了原材料的质量。

youdao

A new composite thermal insulation material is made taking haydite, scrap foam, cement and pulverized fuel ash as main raw material in definite proportion under normal temperature.

以陶粒、废旧泡沫塑料、水泥、粉煤灰为主要原料，在常温条件下按一定配比制成新型复合保温材料。

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A magnesite dry refractory ramming material used in tundish lining of electric furnace is researched, with electrically fused magnesite as main raw material and solid phenolic resin as bonding agent.

以电熔镁砂为主要原料，固体酚醛树脂作结合剂，研制成功与电炉炼钢配套使用的中间包工作层用镁质干式捣打料。

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Iron ore, the main raw material of steel, changed the lakes area and the nation.

VOA: special.2009.11.11

For 3, once nylon had been discovered and proven useful, the race was on, given the supply of cheap oil (the main raw material) post WWII, from the Arabian Gulf.

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