Kontrol panelleri - Stok Fotoğraf ve Görsel

The internal structure of the heat tank for heating systems. This is an internal hot water tank, heat exchanger pipes, a thick layer of thermal insulation

Red laser on optical table in physics laboratory

A night view of the forest of "trees" out of plastic beer bottles at a waterfront park in Qingdao city, east China's Shandong province, 9 October 2016

Close up for the electric control panel with push buttons and light display in the dark room. Green control buttons on the board.

Blue light, in drak background. close up photo. can be used as background or far any other usage.

Protective yellow glasses. Sun protection.