5445 - PREFABRICATED TOWER STRUCTURES
5660 - FENCING, FENCES, GATES AND COMPONENTS
5670 - BUILDING COMPONENTS, PREFABRICATED
9640 - IRON & STEEL PRIMARY & SEMIFINISHED
H363 - INSPECT SVCS/ALARM & SIGNAL SYSTEM
J063 - MAINT/REPAIR/REBUILD OF EQUIPMENT- ALARM, SIGNAL, AND SECURITY DETECTION SYSTEMS
K063 - MOD OF ALARM & SIGNAL SYSTEM
L063 - TECH REP SVCS/ALARM & SIGNAL SYSTEM
W063 - LEASE OR RENTAL OF EQUIPMENT- ALARM, SIGNAL, AND SECURITY DETECTION SYSTEMS