以上来源于: WordNet
N a screw that fits into the boss or hub of a wheel, coupling, cam, etc, and prevents motion of the part relative to the shaft on which it is mounted 固定螺丝钉
Note the small setscrew on the pinion gear... they strip easily.
注意在小齿轮的小型固定螺丝…他们很容易剥离。
Loosen the setscrew that secures the ring with the time meridian indicator.
松开固定时间子午线指示环的定位螺丝。
Set "0 hour" on the R. A. and hour graduation ring to the R. A. indicator after loosening the graduation-ring setscrew.
松开赤经兼小时刻度环的定位螺丝后把赤经兼小时刻度环“0小时”位置对准赤经指示箭头。
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