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| подтопленный дырчатый щит (The perforated steel plate placed below the average water level in the boiler drum is called the submerged plate. Nik-On/Off) | |||
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| подтопленный дырчатый щит (The perforated steel plate placed below the average water level in the boiler drum is called the submerged plate. Nik-On/Off) | |||