Tom Bishop wrote:Something I want to Know.
Behind goods trains you see cylindrical carts being pulled. Some are V’ed, in the middle, to the ground and others to the sky.
Why?
Liquids fill and empty from the top while powders and thick slurries fill from the top and drain from the bottom(liquid is easy to pump out),....it also has to do with the clients storage facilities,subterainian storage tanks or tanks on the surface.





