GBM ndi makina odulira zitsulo pogwiritsa ntchito tsamba lodulira lomwe limagwiritsidwa ntchito kwambiri pamakampani opanga zitsulo.
Ndi yoyenda pansi pamodzi ndi m'mphepete mwa mbale yokhala ndi liwiro lalikulu pafupifupi mamita 1.5-2.8 pa mphindi. Ndi mitundu ya GBM-6D, GBM-6D-T,GBM-12D, GBM-12D-R,GBM-16D ndi GBM-16D-R yokhala ndi mitundu yosiyanasiyana yogwirira ntchito ya pepala lachitsulo.
