详细解释:n. 定位螺钉
【机】 固定螺钉, 止动螺钉
英语解释：
名词 setscrew:
a screw that is used to adjust the tension on a springa screw (often without a head) that fits into the boss or hub of a wheel or cam etc. and prevents motion of the part relative to the shaft on which it is mounted