What do you think of the size of the steel tape measure?

Numbers on the tape measure: The numbers on the tape measure are divided into two rows, one is cm /CM, and the other is inch, 1cm is about 0.3937 inch, and 1CM is about 2.54 cm. ..

City ruler, city inch; The front of the tape measure is divided into two parts, one is metric scale (meters, centimeters) and the other is English scale (feet, inches). Generally, the numbers on the tape measure are divided into two rows, one row is cm /CM and the other row is inch.

Therefore, the shorter number unit between two numbers is centimeters, and the longer number is inches. The number font in centimeters is also smaller than that in inches, 100 cm = 1 m, and the commonly used unit is centimeters.

Temperature effect:

The main structure of steel tape measure is a whole steel strip with certain elasticity, and the steel strip has the characteristics of thermal expansion and cold contraction.

(1) When the temperature difference between the standard steel tape measure and the inspected steel tape measure is 20%, the dimensional error caused by the temperature is zero.

(2) When the material and temperature of the standard steel tape measure and the measured steel tape measure are the same, the dimensional error caused by temperature is directly proportional to the thermal expansion coefficient and temperature.

Reference to the above content: tape measure-Baidu Encyclopedia