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Subject
- Beckman Instruments, Inc.639
- Scientific apparatus and instruments565
- Hydrogen-ion concentration--Measurement--Instruments56
- Spectrophotometer54
- Beckman Instruments, Inc. Spinco Division49
- Centrifuges39
- Liquid chromatography34
- Medical laboratories--Equipment and supplies31
- High performance liquid chromatography30
- Air--Pollution--Measurement27
- Oxygen--Measurement27
- Oxygen--Analysis26
- Medical electronics--Equipment and supplies25
- Ultraviolet spectroscopy23
- Infrared spectroscopy22
- Buildings21
- Liquid scintillators19
- Amino acids--Analysis18
- Gases--Analysis18
- Liquid scintillation counting18