pillar ladder 中文意思是什麼
pillar ladder
解釋
艙內支柱兼升降梯柱-
Answer : ( the pillar of 1 ) ladder needs to be able to bear the total mass when the staff member carries tool scale
答: ( 1 )梯子的支柱需能承受工作人員攜帶工具攀登時的總質量。
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