![Plastic or cast iron trench doors of drain](https://repairsl.metaldetectorsforgold.net/wp-content/uploads/2015/01/h7k21xioau-150x150.jpg)
The eyes of sanitation are elements that are part of many underground pipes. In most cases, the eyes of sanitation take form a cylindrical, cubic, parallelepiped, etc. The eyes of sanitation are used in various areas such as that in the field of sanitation and highways, or in the field of agriculture. The eyes of […]