杯头螺丝；当要调节手轮在机架上的位置时，先要松开此螺丝，以便固定手轮。

Cup head screws, When should adjust the handwheel on the frame, the first to loosen the screw so that fixed the handwheel.

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他的右臂向头的一侧伸开，手上还紧紧握着一只咖啡杯。

His right arm was extended up beside his head, still holding on to a coffee cup.

《柯林斯英汉双解大词典》

三杯酒落肚，我的头开始发晕了。

My head began to spin after three glasses of wine.

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