jīfēnduōzhòngsǎomiáochǎngzhìdiànlízhìpǔjì integrating multiscanning field ionization mass spectrometer
jīfēnxué .Cf cānkàn differentialcalculus(differential). branch of calculus concerned with finding out the sum total of a lot of extremely small numbers, and with applying this knowledge to calculating areas, volumes, etc
jīfēnshíyàn integral experiment
jīfēnshìyālìbiǎo integrating manometer
jīfēnshìshùzìdiànyābiǎo integrating digital voltmeter