... , alkali, salty and water polluted environment.Manhole cover is a new product developed in recent years ... cast-iron, cement ones. Composite material manhole cover is also widely applied in new factory construction ... SMC&BMC products in our factories, such as manhole cover, electricity meter box, current breaker, water tank, ... takes about 15 days to Middle East by boat, 20 days to Europe or USA.Q10: ...