back stopping

  • 上向梯段回采
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back stopping的英文翻译是什么意思,词典释义与在线翻译:

英英释义

名词 backstop:
  1. (baseball) the person who plays the position of catcher

  2. (baseball) a fence or screen (as behind home plate) to prevent the ball from traveling out of the playing field

  3. a precaution in case of an emergency

back stopping的相关资料:

临近单词

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