tamping machine

名词 n.
中文释义

英文释义

名词 n.
  1. A self-propelled rail-mounted machine used to pack or tamp ballast under railway tracks; a ballast tamper.
    — By 1958, there will be available for service 100 ballast tamping machines and 16 ballast cleaning machines.

词形变化

tamping machines plural
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