When the concave upper nut is tightened, the effect produced is exactly the same as that produced by a hammer driving in a wedge.

当上螺母的凹面与之锁紧时，其效果与用一个锤子敲进一楔子的效果完全相同。

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Remove the upper suspension arm nut and bolt at the axle bracket.

从车轴支架上拆去上端悬吊臂螺帽和螺栓。

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The upper stem is threaded into the diaphragm retainer nut.

上阀杆通过丝口旋在横膈膜止动螺母里。

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Fruit and nut trees are the upper level, while below are berry shrubs, edible perennials and annuals.

FORBES: Written by Matt Hickman