Centrifugal pumps, compressed air pumps, lubricating pumps, rotary pumps, steam pumps, vacuum pumps, fuel pumps, all being parts of, or for use with, motors; regulators for feed water, regulators for mixing and pressure regulators, all being parts of, or for use with, machines; metal taps and metal cocks, all included in Class 7; steam valves, by-pass valves, pressure valves, power reduction valves, return valves, interruption valves and clack valves, all being parts of machines.;
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