Skip to main content

Drop Hammer for Small Shops, A Wiggler or Telltale for Centering Work

00
Scientific American Magazine Vol 103 Issue 12This article was originally published with the title “Drop Hammer for Small Shops, A Wiggler or Telltale for Centering Work” in Scientific American Magazine Vol. 103 No. 12 (), p. 220
doi:10.1038/scientificamerican09171910-220a