natural coarse sand 中文意思是什麼
natural coarse sand
解釋
天然粗砂-
Abstract : by means of natural, coagulative and sand peak coagulative settling test, the flowing water test of high, sub, and low turbidity water containing most of coarse silt have been research. some results are concluded
文摘:通過自然沉澱、混凝和沙峰型混凝沉澱試驗,對以"粗」組分泥沙為主的高濁度水和低濁度水進行了動水試驗研究,取得一些成果 -
The cushion layer for the dam is constructed with the material prepared mainly with natural sandy gravel and mixed with proper amount of pebble and coarse sand
大壩墊層料採用以天然砂礫料為主、摻入小石和粗砂以調整級配的方式生產。
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