Aluminium mbiri ma saw masamba ndi apadera kudula macheka masamba a aluminiyamu aloyi zipangizo. Aluminiyamu ndi yolimba kuposa matabwa, koma matabwa alinso ndi mawonekedwe apadera, ndiko kuti, ali ndi ulusi wamatabwa wochuluka komanso kulimba kolimba, choncho m'pofunika kudula mitundu iwiri iyi ya zinthu, bwino kwambiri. zosiyana. Aluminiyamu mbiri ma saw tsamba ndi trapezoidal lathyathyathya dzino mtundu, angatenge ngodya ndi madigiri 6-10, ndi tsamba kutsata ngodya ndi madigiri 0; podula zida za aluminiyamu, mawonekedwe a dzino ndi mawonekedwe a ngodya amagwirizana kwambiri ndi mawonekedwe a aluminiyumu ngati chinthu; ndi macheka masamba odulira matabwa nthawi zambiri mano kumanzere ndi kumanja, ndi ngodya kutsogolo kuposa madigiri 15, tsamba kupendekera ngodya madigiri 5-10, ndi ngodya zazikulu ndi kumbuyo ndi ngodya zazikulu zokhota. Kupanga kotereku kungatsimikizire kuti tsamba la macheka lili ndi kuthwa kokwanira pankhani ya ulusi.