Imashini yo gukurura igendanwa ya GMM-H yitwa kandi imashini yo gukurura ikoresheje intoki itanga imiyoboro minini kugeza kuri mm 15, ihindura inguni kuva kuri dogere 15 kugeza kuri 60. Uburyo bworoshye bwo kuyiyobora hamwe n'imizingo iyobora, kuyitwara kugira ngo ikore.
