ballast pit

 
       
  • 碎石料坑,採石場

ballast pit的用法和樣例:

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.
    實踐表明在特殊困難地形將林業索道用於採石場作業有明顯效益。
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