... 转盘组合器和安全阀：swing combiner and relief valve 转盘总成：circle assembly 转盘柱塞总成：swing spool assembly ...
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circle drawbar assembly 转盘牵引架总成
It is learnt that the 2015 Arctic Circle Assembly will soon be held in Iceland.
据了解，第三届北极圈论坛大会即将在冰岛举行。
The timer began, and everyone started to work frantically at their task, placing completed items on the circle between them and the next person on the assembly line.
计时器开始了，每个人都疯狂地干自己的工作，将完成的物品放入循环中他们和下一个人之间的装配线上。
All the tools include principal of the drill tools, overshot assembly, drill rods, holding dog, circle wrench and etc.
整套钻具包括：钻具总成、打捞器、钻杆、绞车、提引器、夹持器及自由钳等部件。
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