The lubrication system design inside Spiral Conical Dispenser including: the total theory, the key and the design for Dispensing Ring, the strength checkout of the hollow axle and etc;

出灰机内注油系统设计：总体原理、分配环设计与关键、空心滚轮轴强度校核等；

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With a pool and patio outside and a working fireplace and spiral staircases inside, the seven-bedroom house should have buyers lining up.

外面有游泳池和院子，里面有壁炉和旋转楼梯，这个拥有七间卧室的房子本来应该有很多买家的。

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Very steep wooden spiral stairs inside of it.

陡峭异常的屋内木制旋转楼梯。

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If you go inside, there's spiral staircase that goes all the way up.

如果你进去，会有一个旋转阶梯通向顶端。

万丽酒店的魅力 - SpeakingMax英语口语达人

Inside, a spiral staircase swoops from a playfully designed stone floor in the lobby to the bar level of the hotel.

FORBES: The Suite Life

Closer examination of the animals' anatomy revealed that the sea slugs had a large part of their penis coiled up in a spiral inside their bodies, which they would then use to replenish their missing part.

BBC: Sea slug's 'disposable penis' surprises

Long thin tubes, called convection zones, spiral up the inside of the cylinders, gathering nautical winds and generating electricity in the process.

BBC: Betaville lets New Yorkers play real-world Sim City