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aluminium hulpstukken voor buizen (verbindingsstukken, ellebogen, moffen)
aluminium tube or pipe fittings (including couplings, elbows and sleeves) (excluding fittings with taps, cocks and valves, tube supports, bolts and nuts, clamps)
hulpstukken voor buizen (verbindingsstukken, ellebogen, moffen) van koper
copper and copper alloy tube/pipe fittings including couplings, elbows, sleeves, tees and joints excluding bolts and nuts used for assembling/fixing pipes/tubes, fittings with taps, cocks, valves