Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-6-1309-8228-7 |
Объём: | 88 страниц |
Масса: | 153 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
High Quality Content by WIKIPEDIA articles! A stress ball is a malleable toy, usually not more than 7 cm in diameter filled with a soft material used for stress and muscle tension in your hand. There are many types of stress balls. Many are a closed-cell polyurethane foam rubber. This type of stress ball is made by injecting the liquid components of the foam into a mold. The resulting chemical reaction creates carbon dioxide bubbles as a byproduct, which in turn creates the foam Stress balls, especially those used in physical therapy, can also contain gel of different densities inside a rubber or cloth skin.
Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.