The windwheel of the Greek engineer Heron of Alexandria in the first century is the earliest known instance of using a wind-driven wheel to power a machine. Another early example of a wind-driven wheel was the prayer wheel, which has been used in Tibet and China since the fourth century.
This web page is dedicated to our good friend, retired armored vehicle engineer Bill Criswell who passed away a few years ago. A courageous and wise voice of reason against the wheeled truck madness infecting the Army and DoD, the picture above was his favorite of 11 th Combat Engineers leading the way into Baghdad using M113 Gavins with gunshields.
What is Hydraulic Press Machine. Fig.1 Hydraulic Press Machine Diagram . Hydraulic Press Definition. The hydraulic press is a kind of machine which uses the liquid as working medium to transfer energy based on PASCAL's principle to realize various technique.