Ukuqamba Okusha Kwe-Wzrod: Setha ijubane ngedizayini yesisekelo se-O-ring ehamba phambili ephindwe kabili, uqinisekise ukuvala okuqinile kanye nesibopho esiqinile phakathi kwesisekelo sefulegi nesigxobo sefulegi. Lokhu kunakekela imininingwane kuyisinyathelo sokuqala futhi usethe izinga lomkhiqizo embonini yefulegi yokukhangisa kusukela ngo-2006.