To pressurize the underground pipeline (check for herme

To pressurize the underground pipeline (check for hermeticity), a manual piston pump is used. Determine the volume of water (modulus E), which must be pumped into the pipeline to increase the excess pressure in it from P1 to P2. Read the pipeline as absolutely rigid. Pipeline dimensions: length L, diameter d. What is the force on the handle of the pump at the last moment of crimping, if the diameter of the piston of the pump is dn, and the ratio of the leverage arms a / b?
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