... 中碳钢 medium carbon steel 中桅 middle mast 中桅(四节桅时) topmast ...
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... 11 外门架Outer mast（Stationary mast） 12 中间门架Middle mast 13 滑动式门架Slide type mast ...
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middle-mast 中桅杆
·2,447,543篇论文数据，部分数据来源于NoteExpress
She also had to climb up the 80 foot mast on her boat, Pindar, in the middle of the Atlantic Ocean, as well as hand-stitch her giant mainsail with 1, 500 stitches after it ripped in half.
BBC: SPORT | Other Sport | Richards appointed MBE
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