The upper end and the lower end of a lifting screw are in a double-self-aligning hanging structure with a self-aligning roller step bearing so that the stress state of the lifting screw is improved.

提升螺杆上、下端采用调心滚柱止推轴承双调心吊挂结构改善提升螺杆受力状态。

youdao

For each accounting entity a self-contained, double-entry accounting system is employed.

每一个会计单位都运用独立的、复式记账的会计体系。

youdao

If that means missing favorite TV shows, meet-ups with friends, or double-shifts, then so be it until you're back to your normal self again, otherwise everything suffers.

如果这意味着落掉最喜欢的电视剧、朋友聚会或者换班，那么在你恢复正常之前，也就让它错过吧，否则所有事情都是遭罪。

youdao

US Congressman Robert Wexler, a self-described friend of Turkey, attacked the Turkish prime minister of double standards.

VOA: standard.2009.10.27

That raises a double laugh, for self-employment is one of the greatest disappointments.

ECONOMIST: Cuba

Napcabs are German-engineered, 4sqm self-service units, equipped with amenities such as double beds, worktables and air conditioning units.

BBC: Sleep in a pod on the fly

They try the extended-arm self-portrait trick but "we always end up with double chins in those photos, " says Mr. Badger.

WSJ: Don't Forget to Pack a Photographer