track jack 中文意思是什麼
track jack
解釋
軌道頂千斤頂-
Xu yu, xu zhisheng. dynamic characteristics and security research of railway track when tunnel under construction with jack - in method. progress in safety science and technology, 2004 ( 4 ) : 989 - 993
徐? ,徐志勝,朱瑪.高溫作用后混凝土強度與變形試驗研究.長沙鐵道學院學報, 2000年02期 -
Jack sat on the fence for a week last spring before he finally joined the track team
傑克去年春天經過了一周的考慮,最後決定加入田徑隊。
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