IC 009. US 021 023 026 036 038. G & S: Fittings for measuring technology and control engineering; flow gauges, flow controllers, pressure gauges and pressure regulators for hydraulic and pneumatic installations and electromagnetically operated pilot valves; flow measuring apparatus; flow sensors
IC 017. US 001 005 012 013 035 050. G & S: Fittings, not of metal; fittings made of plastic; pipe connections, not of metal; pipe connection pieces, not of metal
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