sandy gravel

基本解釋

For the frozen weathered bedrock, sandy gravel and pebble bed, it is more suitable to use drilling and blasting method than to use the frozen soil excavator.
對凍結(jié)風(fēng)化基巖、砂礫層或卵石層，凍土挖掘機(jī)效率低，宜采用鉆眼爆破法，采用抓巖機(jī)裝載凍土。
The material of the main dam shuck is mainly the local sandy gravel. The clay core and the asphalt concrete core were compared in the choosing of seepage prevention type.
攔河主壩壩殼以當(dāng)?shù)夭牧仙暗[石為主，防滲心墻比較了粘土心墻、瀝青混凝土心墻和斜墻型式。
Gulley microfacies occur as narrow bands within gravel bars and sandy gravel bars, and act as the high trans mssibility pathways for reservoirs in the root fan and inner-middle fan.
流溝以窄條帶狀鑲嵌于礫石壩和砂礫壩之中，為扇根和扇中內(nèi)帶儲層中的高滲通道。