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.