The fuels commonly used in boiler houses in Poland include hard coal, heating oil, high-methane natural gas (GZ-50) and liquefied gases (propan i propan-butan … read on
Monthly Archives: July 2014
Perfect wall
Architects try to realize a technically perfect wall, which would combine all the elements of a full wall and window, would satisfy the wishes of man as to the desired comfort, would be an absorber, radiator, Reflector, filter … read on