| 摘要 |
A plug gauge comprises a main body. The main body is of a T-shaped structure on the whole, and comprises a supporting rod and a cylinder mounted on one end of the supporting rod. The cylinder is made of one of quartz glass, a crystalline or a rock crystal. The supporting rod is made of metal. The wear resistance performance of the plug gauge is improved, the precision change caused by a temperature change is reduced, and the service life and the measurement precision are improved. |
