DSAW(Laba-geesood spiral submerged arc welded tube) sifooyinka: habka wax soo saarka ee tuubada alxanka waa mid fudud, waxtar sare leh, qiimo jaban, horumar degdeg ah. Awooda tuubada alxanka leh ee wareega ah ayaa guud ahaan ka sareysa tuubada dsaw waxayna yareyn kartaa wax soo saarka billet ee tuubada dhexroorka weyn, waxaad...
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