DD Fasteners na-enye oke zuru oke nke arụmọrụ dị elu na ike na-echekwa skru ọdụ ọdụ na skru nke onwe. Ọdụ egwu egwu nwere ngwa ngwa, kwụsie ike na ịrụ ọrụ nke ọma. Ọdụdọ a na-egwupụta ihe nwere ike ịgbanye ngwa ngwa site na 6mm ~ 9mm nnukwu efere ígwè, na ịghasa ọdụ ọdụ #5 raara nye nchara nwere ụdị H nwere ike ịgbanye ngwa ngwa site na nnukwu nchara 12.5mm na 10 sekọnd.

Usoro ngwaahịa skru niile dabara n'ụkpụrụ Australian AS3566. Ihe ịghasa bụ carbon steel (ihe waya sitere na China Steel). Ndụ ọrụ nke ịghasa ọdụ agafeela nyocha ọkachamara mba ụwa SGS. Nnwale ịgba nnu nke screw ọdụ ọdụ nwere ike iru ihe karịrị awa 1000, na ule mmiri ozuzo acid nwere ike ịdịru ihe karịrị awa iri na ise.

Ọdụdụ dị arọ nke ịkwọ ụgbọ ala nwere ike ịzọpụta ihe ruru 50% nke oge ịkwọ ụgbọ ala yana nhọrọ kacha mma iji kwalite arụmọrụ yana nchekwa.

Maka ozi ndị ọzọ, biko lelee na webụsaịtị anyị, nọrọ na nche, Cheers
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