IC 007. US 013 019 021 023 031 034 035. G & S: Pipes and tubes being parts of machines for use in the mining of natural resources and geothermal energy
IC 011. US 013 021 023 031 034. G & S: Boiler pipes and tubes for heating installations and being parts for water, gas, crude oil and ventilating installations; faucets for pipes; flare stacks for use in oil refineries
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