ballast pit

 
       
  • 碎石料坑,采石场

ballast pit的用法和样例:

例句

  1. The practice indicated that evident benefits were obtainedwhen the forestry cableway was applied to the stone pit operations in specially difficult topographies.
    实践表明在特殊困难地形将林业索道用于采石场作业有明显效益。
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