crushed rock造句

1、This machine grinds out the crushed rock ready for road building.
这台机器碾碎用来筑路的石头。

2、Coarse gravel or crushed rock laid to form a bed for roads or railroads.
支撑公路或铁路的用泥土或岩石做成的路基。

3、The slag heaps hold massive dumps of crushed rock discarded after gold extraction.
矿渣堆由金矿挖掘后遗留下来的大量碎石所组成。

4、Coarse gravel or crushed rock laid to form a bed for roads or railroads
道碴用来铺公路或铁路路基的粗砂砾或碎石

5、Macadam type bases involving successive layers of crushed rock bound with rock dust were also used.
人们曾经使用“石结”基层——几层由石粉黏结在一起连续的碎石层。