Composite Cover factory Composite Cover factory 350mm D400 gas station manhole covers In China , PetroChina, SINOPEC and other fueling station are our loyal clients for many years. In abroad, UK, USA, Australia , Kenya , Uganda, Singapore, Malaysia and other countries are using our frp manhole covers always. Product Details: 900mm (13.7鈥? Dia Composite manhole cover MC composite cover have the characteristics of...