Tianjin Wangxia Garage Door Torsion Springs waxaa laga soo saaray silig guga oo xajmi sare leh, oo saliid leh, oo la kulma ASTM A229.
Haddaynu nahay alaab-qeybiyaha Garage Door Spring, waxaan haynaa cabbirro badan oo kala duwan oo Garage Door Torsion Springs ah oo diyaar u ah iibsashada si ay ugu habboonaato albaabbada garaashyada guryaha iyo ganacsiga ee kala duwan.