单词	外通系统
释义	同外通系统--开系统
随便看	differential plate differential plate-- differential coating plate differential plate， differential coating plate differential plunger pump differential polarogram differential polarography differential polynomial differential polynomial ring differential positioning differential potentiomeric titration differential potentiometer differential potentiotitration differential precipitation differential precocity differential prediction differential pressure differential--pressure differential pressure amplifier differential pressure cell differential-pressure cell differential pressure flow-meter differential pressure flowmeter differential pressure gage differential pressure gauge differential pressure indicator