英语词典
In order to achieve the indoor and outdoor double use purpose, the adjustable axle base of the electric scooter was conceived and invented.
为实现室内和室外两用,提出了老年人电动代步车的轴距可调的构思和发明。
互联网摘选
analysis on low flux of the fixed-blade adjustable axle induced-draft fan
静叶可调轴流式引风机出力低的原因分析
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