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I never face problem like that because this is not always constant and change as per site conditions but its simple pressure = force/area Pressure you need is50 Pascal No ... See More
I feel the patient can manage the condition through medication and maintaining right social habits
No,but you can adjust the used weight on the pressure relief damper to match the required pressure that has to be maintained in the stair case which is50 Pa
actually i did not face this problem befor but i think there is a simple solution by applying mechanical force balance as below : P=M * g * A which; p = pressure in pa M ... See More