DONGSHAO, onye nrụpụta ama ama na China, dị njikere ịnye gị Flat Countersunk Square Neck Bolts. Anyị na-ekwe nkwa ịnye gị nkwado kacha mma mgbe irechara na nnyefe ngwa ngwa.
DONGSHAO na-akpọ gị òkù ka ị gaa na ụlọ ọrụ anyị ịzụta ihe kacha ọhụrụ, kacha ere, ọnụ ọnụ na elu Countersunk Square Neck Bolts. Anyị na-atụ anya ịrụ ọrụ na gị.
Ọkachamara China Countersunk Bolt}}} na onye na-eweta ihe, anyị nwere ụlọ ọrụ. Nnabata iji zụta {77 site na anyị. Anyị ga-enye gị nkọwa zuru oke. Ka anyị tinye ibe anyị n'ọrụ iji mepụta ọdịnihu ka mma na nke ọma.
Anyị na-eji kuki iji nye gị ahụmịhe nchọgharị ka mma, nyochaa okporo ụzọ saịtị na hazie ọdịnaya. Site na iji saịtị a, ị kwenyere na ojiji anyị ji kuki.
amụma nzuzo