IC 007. US 013 019 021 023 031 034 035. G & S: Metal valves being parts of machines; Pneumatic valve actuators
IC 009. US 021 023 026 036 038. G & S: Electric actuators
IC 011. US 013 021 023 031 034. G & S: Valves and butterfly valves as part of heating systems, air conditioning systems, cooling systems and steam generation and hydraulic water filtering, purifying and heating systems
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