Zida zoyikamo zidebe ziwiri
Zida zonyamula zidebe ziwiri ndi mtundu wa zida zonyamula zokha zomwe zimagwiritsidwa ntchito podzaza ndi kulongedza zinthu za granular ndi ufa.Muli zidebe ziwiri, imodzi yodzaza ndi ina yosindikiza.Chidebe chodzaza chimagwiritsidwa ntchito kudzaza matumba ndi kuchuluka kwa zinthu zomwe mukufuna, pomwe chidebe chosindikizira chimagwiritsidwa ntchito kusindikiza matumbawo.
Zida zonyamula zidebe ziwiri zidapangidwa kuti zipititse patsogolo magwiridwe antchito polola kudzaza ndi kusindikiza matumba mosalekeza.Zidazi zimagwiritsidwa ntchito m'mafakitale monga ulimi, mankhwala, chakudya, ndi zomangamanga kunyamula zinthu zosiyanasiyana monga feteleza, mbewu, simenti, ndi mankhwala.
Zipangizozi zimapangidwira kuti zizigwira ntchito moyenera komanso molondola, kuonetsetsa kuti thumba lililonse ladzaza ndi zinthu zoyenera.Ilinso ndi zinthu monga kuwerengera zikwama zodziwikiratu, alamu yodziwikiratu yakusowa kwa zinthu, komanso kutulutsa kwachikwama, kupangitsa kuti ikhale yosavuta kugwiritsa ntchito ndikusamalira.