identifier
(1)鉴别器
(2)鉴别剂
(3)标识符
(4)鉴定人

• mouthpiece
• movement
• movie
• movie camera
• moving-coil galvanometer
• moving-iron instrument
• moving light spot
• moving picture
• moving reflector
• moving wave
• moviola
• muff
• muffled glass
• mulitiple-cavity
• mulitphoton molecular dissociation
• mullite
• multialkali photocathode
• multiangualr
• multiband spectral camera
• multibeam holography
• multibeam interferometer
• multibeam resonator
• multichannel
• multichannel analyzer
• multichannel image dissector