The specially made acid-resistant sink consist of a water fitting, two gas fittings, alternative and direct current power supplies and two electric switches and grounded power sockets with covers. Gaskets used in the gas fitting are imported ones. The fitting are durable for continuous switching on and off and painted with electrostatic paint. They are made of DKP sheet iron and shaped in specialy designed molds. 90 watt AC/DC low voltage power supply could give 1, 3, 5, 4.5, 6, 7.5, 9, 12 V energy as can be selected with a key. Apart from the automat, which gives energy to the power sockets, there is a switch between the power socked for safety. The sheet iron body part is grounded in order to made it safe in terms of electricity. The gas system is separated into a different cell from the electric system.