The main reasons for the failure of thread pair during fitting process is analyzed in this paper. Thus the fitting quality of bolt and nut can been increased.
从理论上、实践上分析了螺纹副在装配过程中失效的主要因素，从而达到提高螺栓、螺母的装配质量。
The flared end is then drawn up by the tube nut so the inside surface is tightly secured against the ball seat of the fitting.
接着通过管道螺母将扩口端拔出使其内部表面与管件球座紧密结合。
The flared end is then drawn up by the tube nut so the inside surface is tightly secured against the ball seat of the fitting.
接着通过管道螺母将扩口端拔出使其内部表面与管件球座紧密结合。
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