Armed only with a dog-eared NEWSWEEK ID, I ambled through the gates of the National Assembly last week.
上周，我带着一张折了角的《新闻周刊》ID（NEWSWEEK ID），悠闲地走进了国民大会（National Assembly）的大门。
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。
If the slips fail to hold the tool assembly, the dog collar will prevent the entire assembly form dropping through and being lost in the wellbore.
如果卡瓦未能固定工具组合，则爪环将会防止整个工具组合落井。
If the slips fail to hold the tool assembly, the dog collar will prevent the entire assembly form dropping through and being lost in the wellbore.
如果卡瓦未能固定工具组合，则爪环将会防止整个工具组合落井。
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