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| отрывающее давление (When the water pressure tends to push the door/shutter away i.e. unseat from the gate frame then the type of water head is called unseating /off-seating water head. Oddessita) | |||
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| отрывающее давление (When the water pressure tends to push the door/shutter away i.e. unseat from the gate frame then the type of water head is called unseating /off-seating water head. Oddessita) | |||