Nkọwa nkenke:

U-bolt, makwaara dị ka u-kaadị. Mkpụrụ osisi a na-ejikarị arụ ọrụ na ọkpọkọ ọkpọ iji dozie ọkpọkọ. Nke a bolt dị ka U-udi. Ejikọtara ya femụwe abụọ. Enwere akara 4.8, 8.8 ọkwa, 10.9 ọkwa na 12.9 ọkwa. Ngwunye ọkụ na-ekpo ọkụ na-ekpo ọkụ bụ U-bolt mgbe ọkụ ọkụ kpaliri ọgwụgwọ elu, si otú a na-enweta mmetụta mgbochi mmebi.