Sounds interesting Ed. A quick Google search turned up this:

http://books.google.ca/books?id=uG7aqgal65YC&pg=PA356&lpg=PA356&dq=concre te+machine+tools&source=web&ots=6-OdlmVa_H&sig=Sakj_5qwhHL5fH3KXLdpbUaYn1A&hl=en&sa= X&oi=book_result&resnum=4&ct=result

--
Pete Snell
Department of Physics
Royal Military College
Kingston, Ontario,
Canada
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Being shot out of a cannon is always better than being
squeezed through a tube.

Hunter S. Thompson (1939 - 2005) Kingdom of Fear