A unit of length, three feet is one meter, usually engraved with centimeters and millimeters. Student meter:1cm; Tailor's meter ruler (tape measure):1mm.
Extended data:
The types of rulers are:
1, meter scale: made of wood or plastic, only one meter long and inflexible. The picture shows the physical meter ruler for teaching.
2, tape measure: made of plastic and other materials, ranging from one meter to two meters, can be bent, used for cutting, can also be used for physical education class (long jump, shot put to measure the length). Soft cloth material can be used for construction site measurement.
3. Tape measure: made of metal and other materials, ranging from 3 to 5 meters, with certain flexibility, used for decoration and other projects. Tape measure is a common measuring tool in daily life. What we often see is a steel tape measure, which is often used in construction and decoration, and is also one of the necessary tools for families. Divided into fiber tape measure, tape measure, waist measure and so on. Lu Banchi, Feng Shui ruler and secretary also belong to steel tape measure.
The numbers on the tape measure are divided into two rows, one row is CM /CM, the other row is inch, 1CM is about 0.3937 inch, and 1 inch is about =2.54CM, so the shorter number unit between the two numbers is cm, the longer number unit is inch, and the number font in cm is smaller than inch,1.
References:
Baidu Encyclopedia _ Mi