Tunnel boring machine

Machines are ones that reduce human work load. A character in Five point some one asks his Mechanical professor , what about machines used in the gym , are they machines to reduce human work force ?.

Here the image shown is a Tunnel boring Machine, One of the gigatic machines humans have ever made, This monster can overcome any thing includuig rock,A TBM machine reduces the noise in creatign a tunnel , where explosives are used.

image courtesey : http://skeledog.com/
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