The super light friction steel - support is suitable for jib door window , it can not only meet your requirement on security and convenience when opening , but also serve you with enough force of friction 产品说明：轻量级的摩擦式钢撑适用于平开窗户，它能满足你对安全性及开关方便的需求，并且在你开窗子的时提供足够的摩擦力。
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