Posted by daveyk [173.245.56.73] on Sunday, June 05, 2016 at 22:57:10 :
In Reply to: Re: June 6th D day. OT posted by Rick [162.158.255.76] on Sunday, June 05, 2016 at 22:41:53 :
don't know but think they were mechanical and they invented the Victaulic groove lock pipe couplers to lay those pipe and other pipelines for WW2.