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There is a widespread push in North America to replace hydraulic lifting systems with electromechanical systems. This trend has been going on for many years in Europe and is now really taking hold in North America. Many engineers are now tasked with the job of eliminating environmentally unfriendly hydraulic oil with systems that are purely electromechanical. When making this changeover, a number of important factors need to be considered to make sure the new design will work properly, efficiently, and reliably over the life of the system.
Even for a toddlin town famous
for making “no small
plans” — such as, for example, reversing in 1900 the Chicago River to secure clean drinking water, or rebuilding itself seemingly overnight after the devastating “Great Chicago Fire”
(1871) — to physically — and successfully — elevate itself as much as 14 feet above its original ground level defies not only description but credulity.