The character of fly ash and technical requirements as filling agent of plastic were analyzed.
分析了粉煤灰的特性及其作为塑料制品填充剂所应满足的技术要求。
In the old days, one could get away with filling in a rarely used character by hand.
过去,人们可以通过手动填写生僻字来解决这个问题。
The basic character, proportion and mechanics tests of filling material are studied too. 4 Problems and alternation schemes of pipeline are studied.
并研究了充填材料的基本性质,充填材料的配比实验和力学实验。(4)管路存在的问题及改造方案。
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