microstampingWiktionary 原文英美构词拆解micromicro-前缀stampingstamping词干micro-(diminutive) Very small. · (metric units) One millionth.词源说明From micro- + stamping.释义名词noun1The use of laser technology to engrave a microscopic marking onto the tip of the firing pin and onto the breech face of a firearm, so that spent cartridges give information about the firearm.