N?mba patent nlereanya bara uru: ZL201720537626.5

Ejiri ya nke ?ma site na 45 # nchara, yana tungsten carbide na-agbap?ta na mgbanaka d? n'èzí iji chebe okirikiri nke diski ?nya ?gb? ala ka ? ghara iyi, si otú ah? na-echebe bolts nke ?ma, na-eme ka ? b?r? ihe nchebe na nke a p?r? ?dabere na ya; iji kwado disassembly na mgbak?. (Nt?ziaka na-agbanwe agbanwe, uru nguzozi ≤5g)