Hoʻokumu ʻia ʻo Tianjin Wangxia Roller Shutter Door Torsion Springs mai ke kiʻekiʻe-tensile, ka aila-tempered puna uea, e hui ana me ASTM A229. ʻO kā mākou puna wai āpau i lubricated e hōʻemi i ka friction a me ka corrosion me ka hoʻonui ʻana i ke ola o ka puna.
Roller pani puka puna counterbalance ke kaumaha o ka puka e maʻalahi ka wehe a pani.No laila, he mea nui ka puna uea paʻa a me ka ʻenehana hui e noʻonoʻo ana i ka hilinaʻi a me ka palekana i kahi manawa lōʻihi loa.