The composition and test contents of the testing device for tight-lock couplers are described.

介绍了密接式车钩试验装置的组成和试验内容，对试验中遇到的问题提出了解决办法。

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This paper introduced the type, structure, function, and theory of the new tight-lock coupler applying to city track traffic.

介绍了新型城轨用密接式车钩的型式、结构、功能和原理，论述了强度、运动学分析、制造工艺等关键技术研究和试验情况。

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Tight-lock coupler casting yield can be increased by 9% and the consumption of raw materials reduced and the economic benefits increased.

通过本课题研究，密接式车钩铸件出品率可以提高9%，降低了原料消耗，提高了工厂的经济效益。

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The parasite anchors itself to the slippery surface of the host intestine using micro-needle tips that pierce the surface and then, once wet, swell to lock tight.

BBC: 'Bed-of-needles' super-grip plaster for surgical wounds

There are times when that lock becomes too tight and grating to bear, as when a blond figure, garbed in ice-blue, crawls through a room on all fours, while another woman shovels earth onto her, in a doomed but determined bid to bury her alive.

NEWYORKER: Theatre on Film