sand pebble soil
常見例句
- The model stratums mainly included miscellaneous filling soil surface, interaction stratum of silty clay, silt and fine sand and pebble round gravel at the bottom of station tunnel.
模型介質(zhì)材料分別模擬地表雜填土層，粉質(zhì)黏土、粉土、粉細(xì)砂互層和車站隧道底部的卵石圓礫層；
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