For needle roller bearings without inner ring, a suitable internal clearance is achieved by selecting the appropriate tolerance for the raceway diameter.

对于无内圈滚针轴承，通过为滚道直径选择合适的公差，可得到合适的内部游隙。

youdao

This clearance space makes it possible to reduce the distance between the sinker (2) and the latch needle (3) or to reduce the wear between these two elements.

此间隙空间使得减小沉降片（2）和舌针（3）之间的距离或减小这 两个元件间的磨损成为可能。

youdao

The second segment includes an opening configured for clearance of a medical needle of a medical needle device during attachment of the extensible shield to the medical needle device.

第二段包括构成用来在将该防护件安装在医用 针装置上的期间让医用针装置的医用针穿过的开口。

youdao