ballast mat

 
  • 道碴层

ballast mat的用法和样例:

例句

  1. Father bought a new welcome mat for our new house.
    爸爸为我们的新房子买了一个擦鞋垫。
  2. I wiped my shoes on the mat before I came in.
    我在进门前把鞋在垫子上擦了擦。
  3. There are some clods of soil on the mat.
    垫子上有些土块。
  4. Pig iron used as permanent ballast.
    压载铁做为永久性压舱物的生铁
  5. The ship was furnished with ballast.
    船上装了压舱物。
  6. The force of his fall was broken by the straw mat.
    草垫的缓冲作用减弱了他下跌的力量。
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