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We can know the length and width of the quilt by measuring the length of two adjacent sides of the quilt. At present, the size unit of quilts on the market is centimeters, which can be accurately measured with a steel tape measure. It must be measured twice with a one-meter meter ruler. At the measuring joint, there must be a little displacement error due to the placement position. At the same time, due to the processing error of the quilt and the shrinkage phenomenon that may exist after the quilt is cleaned, the measured value may be deviated, and the deviation range may be within 2.
A ruler is a unit of length, which is called "city ruler" in China (three feet equals one meter in modern times) and "ruler" in Britain. Sometimes we also call the tools for measuring length rulers, such as "bamboo ruler" and "steel ruler". Sometimes we also call things like rulers "rulers", such as iron (a weapon used by ancient knights to fight) and rings (a tool used by religious places or educational institutions to punish students and make them more pious and diligent).
Brief introduction to the development of ruler: life can not be separated from ruler, building a house to measure land, making things and clothes, etc. According to Lu Chunqiu. Xia Ji Ji. Ancient music works ",ancient Chinese people determined the length of the ruler according to the length of the musical instrument with the musical sound of" yellow bell ",so the ancient ruler was also called the musical ruler. Lv Chi. Huangzhongchi. It is the basis of measurement. Later generations had different scales.
Rulers exist in ancient and modern times, but the quantity (actual length) is different. For example, the article "Zou Ji satirizes the king of Qi and can be remonstrated" says: "Zou Ji has repaired more than eight feet." According to today's ruler, Zou Ji's body length is more than 2.66 meters, which is obviously too high.
Obviously, the ancient ruler is shorter than today's ruler. The original ruler refers to the distance between a man's thumb and middle finger, which is about 20 cm. The ruler of the Zhou Dynasty is now 19.8+0 cm. By the Warring States period, one foot was about 22. 12 cm now, but at that time, countries were not completely consistent. For example, the Chu foot unearthed during the Warring States period is 22.7 cm long.
Zou Ji mentioned earlier was a native of Qi during the Warring States Period. According to one foot 22. 12 cm, his height is above 1.8 m, and he is considered a handsome man even today. In Chen Qingbiao, there is a boy who is five feet tall and won't open the door. The author Shi Mi is from the Western Jin Dynasty. At that time, one foot was now 24 cm, so the boy who was five feet tall was a boy with a height of 1.2 meters. "Five feet" can also follow the saying of the previous generation, instead of strictly following the law of gold, so it will be shortened a little on the basis of 1.2 meters, that is, 1. 1 meter or so.
References:
Baidu encyclopedia-ruler