Installation of door closers and rolling type hinge, so that can ease the doors open automatically, and without any noise and collisions.

加装闭门器和滚动轴承式合页，使门扇能够轻松自如自动开启，且无任何杂音和碰撞。

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Guangdong Yongheng Metal Products Factory is a production of the Earth'saxis, handles, door closers, KFC door locks and other Metal products, professional manufacturers.

广东永恒五金制品厂是一家专业生产地轴，拉手，闭门器，肯德基门锁等五金产品的厂家。产品以设计新颖、品质优良和服务完善，深受广大客户的青睐。

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Surface mounted closers shall be full rack and pinion type, with pressure cast alloy shell, with no more than 53 mm (2 1/8") projection from the door surface."

表面安装式关门装置应是全齿条的和小齿轮型的，带压力铸造合金的外壳，从门表面突出不超过53毫米（2 1/8英寸）。

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Surface mounted closers shall be full rack and pinion type, with pressure cast alloy shell, with no more than 53 mm (2 1/8") projection from the door surface."

表面安装式关门装置应是全齿条的和小齿轮型的，带压力铸造合金的外壳，从门表面突出不超过53毫米（2 1/8英寸）。

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