Overview:
Heavy timbers are cut, drilled and treated for use as railway ties on bridges. Selective membranes are formed and installed in filtration units; hydraulic mechanisms are assembled into machines that drive posts into the ground; and wooden or metal airframes, wings, control surfaces and engines are brought together to build biplanes.
Release Date : 2014-04-24
Genre : Documentary
Duration : 21 menit
Rating : ⭐ 10/10 (1 votes)
Actors : Lynne Adams