He loea ʻo Changtai i ka hana ʻana i ka Semi-aunoa Round, square, rectangular Can Making Machinery a me ka maʻalahi o ka lawelawe ʻana i ka meaʻai Tin Can Making Production Line, i haku ʻia me ʻekolu mau papa metala: hiki ke kino, hiki ke uhi a hiki i lalo.Hiki ke hoʻohālikelike ʻia ke kino hiki ke hoʻohālikelike.