backing concrete是什么意思 backing concrete怎么读
backing concrete的相关资料
backn.后面；背脊；靠背；后背；后卫vt.支持；后退adv.向后地adj.向后的；后面的；偏远的；过时的；积欠的
backrestn.靠背
backing concrete的用法和样例
- But construction cracks in massive concrete frequently occur, which leads to lower ray-shielding efficiency.
但大体积混凝土施工中常会产生施工裂缝，以致降低了它防放射作用的效果。 - It is a difficulty to guarantee the high quality for bulk concrete construction in the high temperature weather.
在高温天气如何保证要求高的大体积混凝土的施工质量是一个难题。
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