working jib 中文意思是什麼
working jib
解釋
操船用艏三角帆-
A new - type quayside container crane with jib - bridge luffing system as the main working part is brought out
摘要提出一種以臂橋架變幅系統為主要工作機構的岸邊集裝箱起重機。
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