GBM imhando yemuchina wekucheka simbi uchishandisa banga rekucheka iro rinoshandiswa zvakanyanya muindasitiri yekuvaka simbi.
Inofamba netsoka pamwe chete nemucheto weplate ine kumhanya kwakanyanya inosvika 1.5-2.8 metres paminiti. Iine mamodheru GBM-6D, GBM-6D-T,GBM-12D, GBM-12D-R,GBM-16D uye GBM-16D-R kune sarudzo ine mhando dzakasiyana dzekushanda dzemhando dzakasiyana dzesimbi.
