花都铁艺护栏 公路养护中心围墙栏杆 防攀爬铁艺防护栏杆 Huadu iron fence highway maintenance center fence fence anti climbing iron guard rail 护栏网表面处理有镀锌、喷塑、浸塑等几种 The surface treatment of guardrail net includes galvanizing, spraying and dipping 喷塑产品多用于室内,浸塑产品多用于室外,浸塑比喷塑本钱高。 Plastic spraying products are mostly used indoors, while dipping products are mostly used outdoors. The cost of dipping plastics is higher than that of spraying plastics.