Reflections on Learning
Monday, May 13, 2013
A trip to the dentist? No, it’s just the SR 99 tunnel boring machine’sscrew conveyer
A trip to the dentist? No, it’s just the SR 99 tunnel boring machine’s screw conveyer
, a photo by
WSDOT
on Flickr.
The "Big Screw" II
I would say that the I.D. of the pipe that contains the screw is 48" (nominal).
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