Copyright marks are also known as “copyright symbols”. A nickname for a copyright page in the United States. All published works requiring copyright shall be marked with formal notice on all volumes as a condition of protection.

According to the copyright law of the United States, in order to protect a published work, a mark must be uploaded in the appropriate position of all books of the work, including (I) the word copyright or its abbreviation or its symbol; (II)Year of first publication; The name of the actual copyright owner. The requirement of such a mark as a condition for copyright protection of published works has been accepted by the world copyright convention, the Rome Convention and the phonograph convention, but according to the world copyright convention, the first item of the mark should always be the copyright symbol.

Source: @100_percent_techno

The spinal cord is the channel connecting the brain and the body. After the brain sends a signal, it transmits the signal to all parts of the body through the spinal cord nerve to control the feeling and movement of the limbs of the body. The spinal cord is located in the spinal canal, and its upper end is connected with the medulla oblongata of the brain. In the spinal canal, it sends out pairs of nerve bundles through the intervertebral foramen on both sides, which are distributed throughout the body and limbs to control the feeling and muscle movement of the body and limbs.

When the spinal cord reaches the first lumbar plane, it forms a spinal cord cone, and downward will form a cauda equina like nerve bundle, which is called cauda equina nerve. The hot and cold pain felt everywhere in the body is transmitted to the brain through the spinal cord for expression. If the spinal cord is compressed or injured, below the injury level, the limbs will have corresponding symptoms, such as limb paralysis, numbness, difficult defecation and so on.

Source: @_mfox

As we all know, physical exercise is conducive to the growth of human bones and muscles. For children who are growing up, learning children’s scooter can not only help their bones and muscles grow, but also enhance their physique, cardiopulmonary function, improve blood circulation and other system functions, which is conducive to their growth and development, enhance their adaptability and enhance their health capital, Reduce the risk of colds and other diseases.

Good children who play with children’s scooters are also easy to build confidence in themselves, from not sliding to smooth turning, sliding and even drift, which can help children establish self-confidence. Choosing a scooter with qualified quality, special shape and attractive playing method is also one of the ways to help children build self-confidence and exercise their balance ability.

Children’s scooters have various types, changeable playing methods and colorful colors. They are also easy to arouse children’s interest. The quality is good. The well-designed scooter can stimulate children’s desire to play games. It is not only a textbook for children to learn, but also the best tool for children to exercise their sense of balance. It is worth reminding that if you use one foot as support for a long time when playing children’s scooters, There will be over developed leg muscles, which will affect the overall development of the body and even affect the height development.

In addition, when playing the scooter, the waist, knees and ankles need to support the body, which also makes these parts vulnerable to injury. Therefore, children should first do warm-up exercise and wear knee protection, elbow protection, safety helmet and other self-defense equipment!

Source: @_jose_g_p_

Wheelchair is a chair equipped with wheels to help replace walking. It is divided into electric and manual folding wheelchairs. It is an important mobile tool for the home rehabilitation, turnover transportation, medical treatment and outdoor activities of the wounded, the sick and the disabled. Wheelchair not only meets the transportation of the physically disabled and the disabled, but also facilitates the family members to move and take care of the patients, so that the patients can exercise and participate in social activities with the help of wheelchair.

Ordinary wheelchairs are generally composed of foldable frames, front and rear wheels, left and right knee pads and foot pedals, left and right removable armrests, handle braking devices, seats, backrest, medical image data bag, bedpan, urine bag hook, electric standing, etc. A hand-operated wheelchair is added with a hand-operated device on the basis of an ordinary wheelchair. Based on the ordinary wheelchair, the electric wheelchair adds an electronic power assist system to reduce the physical consumption of users. Smart Wheelchair Based on electric wheelchair, increased positioning, mobile, standing mobile, remote control mobile and related Internet plus assisted life.

Source: @andy_m76