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Subject
- Beckman Instruments, Inc.630
- Scientific apparatus and instruments558
- Spectrophotometer52
- Hydrogen-ion concentration--Measurement--Instruments51
- Beckman Instruments, Inc. Spinco Division49
- Centrifuges39
- Liquid chromatography34
- Medical laboratories--Equipment and supplies31
- High performance liquid chromatography30
- Air--Pollution--Measurement26
- Medical electronics--Equipment and supplies25
- Oxygen--Measurement25
- Oxygen--Analysis24
- Ultraviolet spectroscopy22
- Infrared spectroscopy21
- Buildings20
- Liquid scintillators19
- Amino acids--Analysis18
- Gases--Analysis18
- Liquid scintillation counting18