1. 环锯：中为2mil PI与铜箔板材所环锯(Trepan)出的4mil导孔,孔距8mil. 右为六层PTFE板材自铜面向内所烧制之6mil孔,可见到铜箔边缘之烧熔情形. 从90年初各种非机械加工的微盲孔与埋孔兴起后,使得电路板的制造与组装技术,出现了 SMT 后的一次大革命.
2. 环钻：trendsetter 创造潮流者,时装设计师 | trepan 环钻 | trepan-formed perforator 圆钻形穿孔器
3. 钻井机;凿井岩机：trend surface analysis 球面分析 | trepan 钻井机;凿井岩机 | trepanner 凿井钻机
4. 钻孔机：trente et quarante 纸牌赌博 | trepan 钻孔机 | trepang 海参
noun
1. a drill for cutting circular holes around a center
2. danci.911cha.com
2. a surgical instrument used to remove sections of bone from the skull
Synonym: trephine
verb
1. cut a hole with a trepan, as in surgery