Ngwaọrụ GMM-H nwere obere akara na-akpọ ka igwe na-eme akwụkwọ ntuziaka na-ebugharị chamfers ruo 15 mm, mgbanwe na-aga n'ihu site na 15 ruo ogo 60. Nhazi nke Ergonomic maka na-eduzi ngwa ngwa na-eduzi rollers, na-aga ọrụ.
