属于或关于冲积层的。
这些数据可为深厚冲积层冻结法凿井工程的设计提供参考依据。
These data may chisel the well project for the deep alluvium freezing process the design to provide the reference.
溆浦砂锡矿床赋存在第四系冲积层中锡石主要富集在底部砂砾石层。
Placer tin deposit in xupu occurs in alluvial sediment of quatemary system and cassiterite chiefly concentrates at the bottom of gravel layers.
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