perforating telegraph

进出口专业英语词汇... ... perforating roller 穿孔辊 perforating telegraph 凿孔电报机 perforating typewriter 凿孔打字机 ...

Agreement... ... perforated-tape retransmitter 打孔带转发机 perforating telegraph 打孔电报机 perforation rate 打孔率 ...