IC 007. US 013 019 021 023 031 034 035. G & S: Valves being parts of machines; pumps being parts of machines, air valves being parts of machines, water deaerators, pressure reducers being parts of machines, pressure regulators being parts of machines, pressure valves being parts of machines
IC 011. US 013 021 023 031 034. G & S: Pressure water tanks, namely, hot water pressure tanks, thermostatic valves as parts of heating installations
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