What does the ratio of 2: 1 mean?

The ratio of 2: 1 means that the ratio of two numbers is 2 to 1, which is usually used to describe the quantitative relationship between two numbers.

Among them, the number before the colon indicates the number or size to be compared, also called dividend, and the number after the colon indicates the number or size to be compared, also called divisor. In this ratio, the first number is twice as much as the second number, or the second number is half as much as the first number. The ratio of 2: 1 can also be written in simplified forms such as 1:0.5 or 100:50. This ratio has applications in many fields, such as architectural design, painting, photography, music and so on.

The drawing scale of mechanical drawing refers to the scale used to draw drawings in mechanical drawing. Usually, the drawing scale refers to the proportional relationship between the size of the object on the drawing and the actual size.

The commonly used scales in mechanical drawing are: 1: 1: 2, 1:5, 1: 10, 1:20,1. Other scales indicate that the dimensions on the drawing are corresponding multiples or fractions of the actual dimensions. For example, the ratio of 1: 10 means that the size on the drawing is110, that is, 1mm on the drawing means that the actual size is10 mm.

The selection of drawing scale of mechanical drawing usually takes into account the size, content and drawing purpose of the drawing. If the scale is too small, the content of the drawing may not be clear, while if the scale is too large, the drawing may not be completely displayed on one page, so it is necessary to choose the appropriate drawing scale according to the specific situation.