I-Tianjin Wangxia Roller Shutter Door Torsion Springs yakhiwe ngocingo lwasentwasahlobo oluqinile, olufutheka uwoyela, luhlangana ne-ASTM A229.Zonke iziphethu zethu zigcotshwe efekthri ukuze kuncishiswe ukungqubuzana nokugqwala kuyilapho kukhulisa impilo yomjikelezo wasentwasahlobo.
Iziphethu ze-roller shutter door ziphikisana nesisindo somnyango ukwenza kube lula ukuvuleka nokuvala.Zifeza injongo efanayo yezibalo ezisetshenziswa ukulinganisa iminyango emakhulwini eminyaka.Ngakho, intwasahlobo yocingo oluqinile kanye nobuchwepheshe bokuhlanganisa kubalulekile uma kucatshangelwa ukwethembeka nokuphepha esikhathini eside kakhulu.