“gin pole”的概念、定义、翻译、参考文献-科学参考

单词	gin pole
释义	gin pole [`jin ´pōl] ^{MECHANICAL ENGINEERING} A hand-operated derrick which has a nearly vertical pole supported by guy ropes; the load is raised on a rope that passes through a pulley at the top and over a winch at the foot. Also known as guyed-mast derrick; pole derrick; standing derrick.
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