Cheka wokotamisa chubhu yemhangura kuita chimiro uchishandisa Hairpin Bender uye Tube Cutting Machine, wobva washandisa fin press line kuti ubayire foil yealuminium kuita mafins. Wobva waisa puranga pachubhu, worega chubhu yemhangura ipfuure nepaburi remafin, wobva wawedzera chubhu kuti ikwane zvakanaka ne vertical expander kana horizontal expander. Wobva wabatanidza copper tube interface, wodzvanya kuti uone kana paine madonhwe, batanidza bracket, wobva waisa package mushure mekupasa ongororo yemhando.