Method 1. Add a spacer to solve the problem that the meter does not return to zero.
Method 2, the fan-shaped tooth is widened to solve the contact surface of the instrument, and is resistant to wear to achieve the function of prolonging the service life.
Method 3, the movement of the instrument is the heart component of the pressure gauge, more than 80% of the instrument damage is caused by the damage of the movement, the instrument can not be used to solve the problem of the instrument jump file by adding the limit in the existing movement.
