Thaum cov roj-tempered torsion springs yog rhuab thiab quenched nyob rau hauv cov roj, zinc-galvanized springs raug rau cov txheej txheem kub-dip galvanization.Cov txheej txheem no suav nrog kev tso dej rau lub caij nplooj ntoos hlav steel hauv lub vat ntawm zinc molten ntawm qhov kub siab heev.Ntau tus neeg xaiv zinc-galvanized torsion springs vim lawv qhov tsis txaus ntseeg tiv thaiv xeb thiab xeb.
Yuav Ua Li Cas Ntsuas Qhov Rooj Qhov Rooj Torsion Springs?
Yuav kom ua tiav koj daim ntawv xaj rau Garage Door Torsion Springs, thov muab cov ntaub ntawv hauv qab no txog txhua lub caij nplooj ntoos hlav:
(1) Sab hauv Dia
(2) Hlau Loj
(3) Caij nplooj ntoos hlav cua Direction
(4) Caij nplooj ntoos hlav ntev