Knowhow to review planned operations and requirements with site supervision(ie, signal person), to include determination of working height, boomlength, load radius and travel clearance.

 
  • 知道如何審查計劃和行動(dòng),并要求現場(chǎng)監督(即信號的人),其中包括確定工作高度,臂長(cháng),負荷半徑和旅行手續。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan