axial clearance of plain journal bearing

例句：

1. 1. The machine's axial clearance is measured in millimeters.
   这台机器的轴向间隙以毫米为单位测量。
2. 2. The new design reduces the axial clearance between the gears.
   新设计减少了齿轮之间的轴向间隙。
3. 3.The clearance was so tight that it could not be removed without damaging the parts.
   间隙太紧了，无法去除而不损坏零件。