| http://www.w3.org/ns/prov#value | - Thus, if the user presses the rod 31 right down, i.e. until the base of the hollow piston 3 engages the step 44 on the differential piston 4, then the user can compress the spring 20, thereby breaking the sealing contact previously established between the outer bottom surface 103 of the ring 10 and the lug 32.
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