Drainage Steel Grate 1.full range in type and dimention 2.applicable steel equipment 3.excellent quality of trench cover Drainage Steel Grate 1> Drainage Steel Grate Characteristics:Trench cover light weight, high bearing capacity, safe , skid-proof, easily fixed and dismantled, economical ,long life and durable,ventilated and penetration of light, easily to be cleaned, beautiful in appearance.2> ...