plate mark

基本解释凹印痕

网络释义

1)plate mark,凹印痕2)ball impression,球凹;球印痕3)plate mark,凹印件周围出现的凹痕4)arrow-mark,刮墨刀痕(凹印故障)5)comet,彗星状条痕<凹印故障>6)indented bottom face,在底[下]表面压印[凹痕]