They were developed for physiotherapy and are also used for relaxation. Slipping from a spirit level is safe as long as the user knows how to avoid inhalation under water and how to step on the water. The slip occurs…
They were developed for physiotherapy and are also used for relaxation. Slipping from a spirit level is safe as long as the user knows how to avoid inhalation under water and how to step on the water. The slip occurs…