Seamless: pierced, redrawn, annealed (multi-pass ncig txheej txheem)
Welded: longitudinally welded, redrawn, annealed (multi-pass ncig txheej txheem)
Packing: Tubing yog theem qhov txhab coiled ntawm cov hlau / ntoo nruas lossis spools.
Tag nrho cov nruas los yog spools tau ntim rau hauv ntoo crates kom yooj yim logistic ua haujlwm.