46 21 71
Trash Raking Equipment
46 21 57
Element Screens
46 21 56
Wedge Wire Screens
46 21 53
Perforated Plate Screens
46 21 51
Traveling Water Screens
46 21 46
Disc Screens
46 21 43
Band Screens
46 21 39
Spiral Screens
46 21 33
Rotary Drum Screens
46 21 26
Step Screens
46 21 23
Cylindrical Bar Screens
46 21 19
Continuous Belt Screens
46 21 17
Catenary Bar Screens
46 21 16
Flexible Rake Bar Screens
46 21 13
Chain-and-Rake Bar Screens
46 21 11
Climber-type Bar Screens
46 21 00
Screening Equipment
46 20 00
Water and Wastewater Preliminary Treatment Equipment
46 08 70
Commissioning of Residuals Handling and Treatment
46 08 60
Commissioning of Advanced Treatment Equipment