单词	背景板
释义	背景板background plate
随便看	operational control operational control authority operational control authority {= oca} operational control center of comsat operational control console operational control console，occ operational-control information operational control (opc) operational control system operational control unit operational control unit--ocu operational control unit，ocu operational cost operational crew operational crew, operating staff operational data operational data analysis operational data analysis--oda operational data analysis program operational data analysis program，odap operational data analysis，oda operational database operational data collection system operational data collection system，odcs operational data store