section of ladder 中文意思是什麼
section of ladder
解釋
梯節-
Technical condition of h - section steel rigid suport in ladder - shape used in coal mine
礦用工字鋼梯形鋼性支架技術條件 -
The finite element analysis of ladder horns with rectangular cross - section based on ansys
的矩形截面階梯型變幅桿有限元分析
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