Bed has lower air chamber and upper chamber filled with water, heater being built into at least wall of air chamber, which contains volatile mixture of ethyl alcohol, water and sealant

摘要

The bed (1) has a lower air chamber (2) and an upper chamber (3) filled with water. A heater is built into at least one of the walls (10) of the air chamber, which contains a volatile mixture of 400g ethyl alcohol, 7l of water and a sealant.