positive elevator 中文意思是什麼
positive elevator
解釋
產生正常桿力的升降舵-
Now, with a high - qualified research group, the company is the first to research positive drive elevator and obtained the national patent for it
公司現擁有一支以高素質的研究開發隊伍,在國內首家研製發開強制驅動式電梯,並獲得國家專利。
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