most advncd system for transport of dug material in a cave
Posted: Feb 11, 2008 6:42 am
system Alvek: http://www.youtube.com/watch?v=levhlcVYcLw
10 years of work - more than 100 m3 of transported material, length
more than 50 m, depth -36 m, total angle 450 degree.
check http://en.wikipedia.org/wiki/ALWEG too
m.
10 years of work - more than 100 m3 of transported material, length
more than 50 m, depth -36 m, total angle 450 degree.
check http://en.wikipedia.org/wiki/ALWEG too
m.