Legal analysis: 1. Functional characteristics of the treadmill: develop the strength of human hip and waist muscles, and enhance people's cardiopulmonary function and coordination ability. Usage: separate your feet, stand on the left and right pedals, hold the lever with both hands, and swing your legs back and forth naturally. Precautions: hold the bar with both hands to prevent falling; The leg should not swing too much to avoid muscle strain. When using this equipment, children must be protected by adults. Non-users should not stand in front of and behind the equipment to avoid being hurt by the equipment.

2. Functional characteristics of combined horizontal bar: develop muscle strength of upper limbs and back, and enhance flexibility and flexibility of shoulder joint, elbow joint and wrist joint. Usage: people jump, hold the bar with both hands, do pull-ups or hang their legs. Attention: Hold the bar with both hands to prevent falling. 1.4m and 12 children should be protected by adults.

3. Features of the big turntable: exercise joints such as shoulders, elbows and wrists. Usage: Hold the handle on the turntable with one hand, rotate clockwise and counterclockwise, and move left and right hands alternately. Note: the force should be balanced to avoid ligament damage caused by sudden overexertion.

4. Features of back massager: Exercise back muscles and relieve back fatigue. Usage: the waist is close to the massage column, hold the handrail with both hands and pull the massage column up and down; Stand with your legs in a standing position, back against the massage column, hold the handrail with both hands, and move your body left and right. Note: Don't move your arms too fast. When standing for massage, hold the handrail tightly with both hands.

5. Features of the waist twister: mainly exercise the waist and buttocks to enhance the flexibility and flexibility of the waist.

Legal basis: Article 2 of the Standardization Law of People's Republic of China (PRC) The standards mentioned in this Law (including standard samples) refer to the technical requirements that need to be unified in agriculture, industry, service industry and social undertakings.

Standards include national standards, industry standards, local standards, group standards and enterprise standards. National standards are divided into mandatory standards and recommended standards, while industry standards and local standards are recommended standards.

Mandatory standards must be implemented. The state encourages the adoption of recommended standards.