Helu patent kumu ho?ohana: ZL201720537626.5

Ua hana pololei ia mai ke kila 45 #, me ka tungsten carbide i ho?oku?u ?ia ma ke apo o waho e pale ai i ka pō?ai o waho o ka disk ho?okele mai ka ?a?ahu, no laila e pale pono ai i nā bolts ho?opa?a, e palekana a hilina?i ho?i nā lua i ho?opa?a ?ia e ma?alahi i ka wehe ?ana a me ka hui ?ana. (Dynamic balancing, koena waiwai ≤5g)