UNE-EN 1849-1:2000 FLEXIBLE SHEETS FOR WATERPROOFING - DETERMINATION OF THICKNESS AND MASS PER UNIT AREA - PART 1: BITUMEN SHEETS FOR ROOF WATERPROOFING.
2000UNE-EN 1849-1:2000 FLEXIBLE SHEETS FOR WATERPROOFING - DETERMINATION OF THICKNESS AND MASS PER UNIT AREA - PART 1: BITUMEN SHEETS FOR ROOF WATERPROOFING.