Hollow chikamu chinhu cheimwe geometry yakagadzirwa nesimbi kana simbi uye chinhu chine rimwe simba uye kuoma (sepurasitiki, aluminium, girazi fiber, nezvimwewo) nekukunguruka, extrusion, casting nezvimwe zvakadaro. Kusanganisira angle simbi, chiteshi simbi, I-beam, sikweya simbi, H-danda, etc. chinhu cheimwe geometry yakagadzirwa nesimbi kana simbi uye chinhu chine rimwe simba uye kusimba (sepurasitiki, aluminium, girazi fiber. , etc.) nekukungurutsa, extrusion, casting nezvimwe zvakadaro. Kusanganisira angle simbi, chiteshi simbi, I-beam, sikweya simbi, H-danda, nezvimwe.