a screw that is used to adjust the tension on a spring
a 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
双语例句
The vertical screw shipunloader is voiceless. 垂直螺旋卸船机基本没有声音。
This paper introduces the lower bear's improvement of screw grader. 文章介绍螺旋分级机下部轴承的改造实践。