ball-point pen

n.

圆珠笔；

Ball-point pen
Ball-point pen
Ball point pen
Ball point pen, ink and its eradicator system
Multivariate chemometrics for the forensic discrimination of blue ball-point pen inks based on their Vis spectra
Investigation 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 Lancet
Ball-point pen-light
Ball point pens
The analysis of dyes in ball point pen inks on single paper fibres using laser desorption ionisation time of flight mass spectrometr...
Ball-point pen device
Use of reversed-phase thin-layer chromatography for the identification of black inks from board felt markers and ball-point pens