【化】 reverse double focusing mass spectrometer
in reverse; on the contrary; turn over
【医】 contra-; re-; trans-
buy; establish; install; place; put; set up
both; double; even; twin; two; twofold
【化】 dyad
【医】 amb-; ambi-; ambo-; bi-; bis-; di-; diplo-; par
focalize; focus; focusing
【计】 focussing
【化】 focusing
【医】 mass spectrometer
