The torsional strength of the drilling tools can be greatly increased by using the double shoulder tool joint.

双台肩钻具接头可大幅度提高钻具的抗扭强度。

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The ancient name atlas sea, the name of the Greek myth originated in the double shoulder day hercules god atlas.

古名阿特拉斯海，名称起源于希腊神话中的双肩负天的大力士神阿特拉斯。

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After processing LET thread, stress groove and double shoulder connection for the NC35 thread of Drill Collar in 43/4 inch, torsion tests were done.

4英寸）钻铤NC35螺纹加工LE螺纹、应力槽、双台肩后进行了实物抗扭性能试验，证实双台肩钻铤具有很好的抗扭性能。

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He wants to charge bookmakers 2.5% of their turnover, more than double the current levy, and scrap a pending profits-based scheme, which, he says, makes racing shoulder too much of the bookmakers' business risk.

ECONOMIST: Horse-racing

The attractive row houses nearby are now selling for double or more their purchase value, especially in the area that borders neighbouring Columbia Heights, whose attractive brownstones stand shoulder to shoulder with new high-end condos.

BBC: The new neighbourhoods of Washington DC