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| Keywords: SpaceBeadsSRM 026.jpg Russell Obbink John W Vanderhoff and Thomas R Lettieri of NBS - Thirty micrometer particles produced on the space shuttle have been turned over to the National Bureau of Standards NBS for testing as a standard reference material SRM John W Vanderhoff of Lehigh Univ center who developed the particle production process shakes hands with Thomas R Lettieri of NBS while Russell Obbink ASTM/NBS researcher for SRMs for particle metrology left looks on Image from Standardization News Philadelphia PA used in this article National Institute of Standards and Technology National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Space Beads | ||||
