权威例句
Ball-point penBall-point penBall point penBall point pen, ink and its eradicator systemMultivariate chemometrics for the forensic discrimination of blue ball-point pen inks based on their Vis spectraInvestigation of ball point pen inks by capillary electrophoresis (CE) with UV/Vis absorbance and laser induced fluorescence detecti...What's on doctors' ball point pens?What's on doctors' ball point pens? : The LancetBall-point pen-lightBall point pensThe analysis of dyes in ball point pen inks on single paper fibres using laser desorption ionisation time of flight mass spectrometr...Ball-point pen deviceUse of reversed-phase thin-layer chromatography for the identification of black inks from board felt markers and ball-point pens
