TY - RPRT TI - Disclosures on: an automatic collating and sorting machine, optical heterodyne refractometer, liquid metering pump, stable wide-band relaxation oscillator using three inverting amplifiers, and seat belt webbing abrasion resistance testing machin AU - Robbins, David PY - 1967 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 437 DO - 10.6028/NBS.TN.437 ER -