700x1400
ACO channel 400x600x100 V 110 Vinyl
ACO channel 500x500x100 H 110 Resin
雨水口-偏沟式单箅-砖砌
ACO channel 400x600x200 H 110 Vinyl
ACO channel 500x500x100 H 110 Concrete
ACO channel 300x1500x60 V 110 Vinyl
请描述当前构件存在的具体质量问题,以便我们可以尽快帮您解决~