A small curve in the sliding part of the convex top of the lower nut acts as the wedge.
下螺母凸顶的滑动零件上有一条小弧线充当楔块。
The fixed part comprises a containing part; the sliding part can be movably arranged on the fixed part.
该固定件包括一容置部,该滑动件可移动地装设在该固定件上。
A part that operates by sliding, as the U-shaped section of tube on a trombone that is moved to produce various tones.
型滑管:靠滑动操作的部分,如长号上u型的管子部分,拉动它可以产生各种声调。
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