| http://www.w3.org/ns/prov#value | - The connecting conduit 36 at the end thereof communicating with chamber 35 is provided with a float valve 62, and it leads through a cut-off valve 37 which, in the illustrated embodiment, is controlled in dependence upon the hydraulic pumps 6 in such a manner as to be closed when pressure has built up in the pressure fluid circuit.
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