line block
... line belt 传送带 line block 绳滑车 line booster 线路增强器 ...
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钢丝绳滑车 wire rope block
旗绳滑车 bunting block
升降绳滑车 halyard block
缭绳滑车 sheet block
跨绳滑车 span block
长绳滑车 long tackle block
吊杆头跨绳滑车 derrick head span block
钢绳滑车 tackle block
滑车装绳 reeving ; line reeving
·2,447,543篇论文数据，部分数据来源于NoteExpress
位于重型井架或桅架式井架顶部的固定的滑轮组（称之为滑车轮槽轮），通过该滑轮组钻井钢丝绳进行穿绳。
The fixed set of pulleys (called sheaves) located at the top of the derrick or mast, over which the drilling line is threaded.
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