1) grit and gravel overburden layer
沙砾石覆盖层
2) d and gravel overlay
沙砾覆盖层
3) stone coverage
石砾覆盖
4) gravel covered
砾石覆盖
1.
The test was made in soil and water conservation monitoring center in 2007,based on flowerpot nature evaporation,the evaporation effect under five different size gravel covered was studied.
2007年在水利部水土保持监测中心采用花盆整体称重法,对5种不同粒径砾石覆盖下的土壤水分蒸发效应进行了研究。
5) desert pavement
沙漠(卵石) ,覆盖层
6) deep overburden gravel layer
深覆盖厚卵砾石层
1.
Fast drilling technology on deep overburden gravel layer in treatment of coal gob area;
采空区治理工程中深覆盖厚卵砾石层钻进施工
补充资料：沙砾
沙子和碎石块：秋风吹滩起沙砾｜大风起，沙砾击面。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条