... 救生筏 life raft 起重螺栓 lifting bolt (or screw) 升力线理论 lifting line theory ...
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... 起重机操作员cranan 起重螺杆lifting bolt(or screw) 起重螺栓lifting bolt(or screw) ...
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stone lifting bolt 吊石栓
lifting-bolt 提升螺杆
stone lifting bolt WESTBANK 吊石栓
Lifting Ring Bolt 吊牌螺栓
LIFTING EYE BOLT 吊环螺钉
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