cross hair or cross·hair (krôshâr, krŏs-)
十字線
Either of two fine strands of wire crossed in the focus of the eyepiece of an optical instrument and used as a calibration or sighting reference.
十字線
Either of two fine strands of wire crossed in the focus of the eyepiece of an optical instrument and used as a calibration or sighting reference.
沒有留言:
張貼留言