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two-section ladder是什么意思


中文翻译二节梯

网络释义

1)two-section ladder,二节梯2)two-section extension ladder,二节拉梯3)secondary fly section,第二节拉梯4)section of ladder,梯节5)Elevator Energy-saving,电梯节能6)halfpace stair,两节楼梯

用法例句

    Discussion on the Contribution of Relaxing the Electric Power Tension by Elevator Energy-saving;

    谈电梯节能对缓解全国用电紧张的贡献