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barrel, blowgun, blowpipe, blowtube, blow tube, burette, capillary, catheter, chromatography column, cigarette holder, column, dropper, eye dropper, gun barrel, hosepipe, mouthpiece, pea shooter, pipage, pipette, siphon, speaking tube, stem, syphon, test tube, tobacco pipe, torpedo tube, venturi, wellpoint, well point

cartridge brass, coil, jacket

channel