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-ke, intwasahlobo yocingo oluqinile kanye nobuchwepheshe bokuhlanganisa kubalulekile uma kucatshangelwa ukwethembeka nokuphepha esikhathini eside kakhulu.