gravel extraction – Chinese translation

gravel extraction Obtaining a mixture of coarse sand and small water- worn or pounded stones, (used for paths and roads and as an aggregate) from the earth

environ.

砂石开采，砂石挖掘 (从地层中获取粗砂和细小的受水磨蚀或磨碎之石头混合物，通常用作舖设道路的材料。)

gravel extraction: 3 phrases in 2 subjects

Ecology	1
Technology	2

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