black pen black signature pen
Unfortunately, the instruction, scrawled in black marker, was the defiant graffiti of a visitor who had decided to mock the plastic sign just above it by saying the same thing.
遗憾的是,这句用黑色签字笔涂写的指示,是一名游客违背警示的涂鸦。他在塑料警示牌正下方写下了同样的话,为的是嘲讽这个标牌。
—— 给力词典精选Identification of the Aging of Black Signing-pen Ink Writing by High Performance Liquid Chromatography
高效液相色谱法鉴别黑色签字笔墨水字迹形成时间的研究
—— 给力词典精选Relative writing age analysis of the black roller pen inks by capillary zone electrophoresis
区带毛细管电泳法分析黑色签字笔墨水字迹相对形成时间
—— 给力词典精选Research of TLC Used on Category and Formed Time of Black Signature Pen
TLC分析黑色签字笔色痕种类及形成时间的研究
—— 给力词典精选Novel method for identifying black signing inks
黑色签字笔墨水检验新方法
—— 给力词典精选