3,105 دیدگاه در “آزمون های ورودی متوسطه …

  1. How To Preserve Your House Heating Boiler

    If the boiler is oversized, the gasoline payments will probably be excessive.
    Though superheating provides extra energy to the steam in the type of
    heat there isn’t a effect on pressure, which is decided by
    the speed at which steam is drawn from the boiler and the stress settings of the protection valves 10 The gas consumption required
    to generate superheated steam is greater than that required to generate an equal
    quantity of saturated steam.