11 56 19
Telescope Drive Mechanisms
11 56 16
Telescope Mounts
11 56 13
Telescopes
11 56 00
Observatory Equipment
11 55 16
Planetarium Pendulums
11 55 13
Planetarium Projectors
11 55 00
Planetarium Equipment
11 53 53
Biological Safety Cabinets
11 53 43
Service Fittings and Accessories
11 53 33
Emergency Safety Appliances
11 53 29
Laboratory Controlled-Environment Cabinets
11 53 26
Laboratory Freezers
11 53 23
Laboratory Refrigerators
11 53 19
Laboratory Sterilizers
11 53 17
Laboratory Equipment Washers
11 53 16
Laboratory Incubators
11 53 13.13
Recirculating Laboratory Fume Hoods
11 53 13
Laboratory Fume Hoods
11 53 00
Laboratory Equipment
11 52 23
Audio-Visual Equipment Supports