I-Spiral welded pipe friction adhesion theory manje seyamukelwa kabanzi, ekungqubuzaneni okumile, indawo yokuxhumana yangempela ilingana nomthwalo. Futhi lapho ukungqubuzana okushelelayo, kufanele sicabangele ukuba khona kwamandla okugunda, bese, ukwandisa insimbi evunguzayo yendawo yokuxhumana yangempela kusuka ku-l evamile...
Funda kabanzi