The rule of adding barbell pieces is that the inner side (added first) is heavier than the outer side (added later), that is, the heavy ones are added on the inner side and the light ones are added on the outer side. Because the weight of the clip is 2.5 kg, it is necessary to add small barbell pieces below 2 kg (including 2 kg) outside the clip, and each side of such small barbell pieces is limited to 1 piece.
Most barbells in gymnasiums belong to standard barbells, but there are strict requirements for standard barbells in China. A standard barbell consists of a barbell bar (bar), a barbell piece and a clip.
Related knowledge:
The predecessor of counterweight disc is counterweight. Its development speed is very fast, and one of the important factors is the progress of product technology? The castings are required to have good mechanical and physical properties, as well as good machinability; Another reason is that the development of machinery industry itself and other industries such as chemical industry and instruments has created favorable material conditions for the counterweight iron industry.
For example, the development of detection means ensures the improvement and stability of casting quality and provides conditions for the development of counterweight iron theory; The invention of electron microscope helps people to go deep into the microscopic world of metal, explore the mystery of metal crystallization, study the theory of metal solidification and guide the production of counterweight iron. ?
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