TY - RPRT TI - Advanced Technology Training System on Motor-Operated Valves AU - Wiederholt, Bradley J. AU - Widjaja, T. Kiki AU - Yasutake, Joseph Y. AU - Isoda, Hachiro PY - 1993 UR - https://ntrs.nasa.gov/citations/19960007822 ID - 19960007822 ER -