TOP MANUAFACTURER IN MALAYSIA UNTIL 1996@2015 WE YOK CONCRETE ENTERPRISE MANUFACTURER OF PRECAST COMPRESSED SLAB SPECIALLY NEW DESIGN COMPRESSED SLAB , ROAD BARRIER , EMBANKMENT DRAIN , CATCH PIT , V-DRAIN . U-DRAIN , CAR WHEEL STOPPER , VENTILATION BLOCK ROAD KERB , PIPE CULVERT , CONCRETE SUMP , POROUS PIPE