https://www.ynjsw.com/file/upload/201211/01/12-08-06-36-20.png

PVC-U双壁波纹管

https://www.ynjsw.com/file/upload/201211/01/12-08-11-78-20.png

PVC-C高压电力电缆护套管

https://www.ynjsw.com/file/upload/201211/01/12-08-15-55-20.png

PVC-U环保健康饮用水管

https://www.ynjsw.com/file/upload/201211/01/12-08-20-38-20.png

PVC-U环保排水管

https://www.ynjsw.com/file/upload/201211/01/12-08-25-15-20.png

PVC-U难燃电工线管系列

https://www.ynjsw.com/file/upload/201211/01/12-08-30-63-20.png

PVC-U七孔蜂窝煤 PVC-U四孔通信管

https://www.ynjsw.com/file/upload/201306/13/13-24-02-83-20.jpg

简介：

1

7