"David Lesher" wrote in message
...

A slight OT query....

How are pressure cylinders such as SCUBA tanks and "K Bottles"
manufactured? Some are aluminum, others steel. I'd assumed they're cast
in one piece, but I don't know for sure, and someone asked me..



There was just a thread on that.
http://www.youtube.com:80/watch?v=qA...eature=related