GMMA raupapa pereti mira mira mīhini, he momo mira mīhini beveling mā te whakamahi i kōkuhu mira me upoko tapahi. Awhe mahi whanui mo te matotoru pereti ki te 100mm me te anahera bevel 0-90 tohu ka taea te whakarite me te tino tika o te mata bevel Ra 3.2-6.3.
He tauira GMMA-60S,GMMA-60L,GMMA-60R,GMMA-60U,GMMA-80A,GMMA-80R,GMMA-80D,GMMA-100L,GMMA-100U,GMMA-100D hei whiringa.