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2. Wing Enterprises - Wikipedia

   en.wikipedia.org/wiki/Wing_Enterprises

   Wing Enterprises is an American company headquartered in Springville, Utah company, the largest American manufacturer of ladders as of 2005. [1] The company produces the Little Giant Ladder System, a convertible aluminium ladder system.

3. Mount Washington Cog Railway - Wikipedia

   en.wikipedia.org/wiki/Mount_Washington_Cog_Railway

   The cog, or rack and pinion, system that allows the locomotive to climb Mount Washington. Located in the museum. The rack rail design used is one of Marsh's own inventions, using a ladder-like rack with open bar rungs engaged by the teeth of the cog wheel. This system allows snow and debris to fall through the rack, rather than lodging in it. [42]

4. Werner Co. - Wikipedia

   en.wikipedia.org/wiki/Werner_Co.

   Werner Co. was founded in 1922 by Richard D. Werner as "R. D. Werner Co., Inc.," which specialized in metal moldings.R. D. Werner Co., Inc. became a leader in plastics extrusion during the World War II restrictions on civilian metal usage.

5. Ladder logic - Wikipedia

   en.wikipedia.org/wiki/Ladder_logic

   Ladder notation is best suited to control problems where only binary variables are required and where interlocking and sequencing of binary is the primary control problem. Like all parallel programming languages , the sequential order of operations may be undefined or obscure; logic race conditions are possible which may produce unexpected results.

6. Pallet racking - Wikipedia

   en.wikipedia.org/wiki/Pallet_racking

   Pallet racking made from Dexion slotted angle. Pallet rack is a material handling storage aid system designed to store materials on pallets (or “skids”). Although there are many varieties of pallet racking, all types allow for the storage of palletized materials in horizontal rows with multiple levels.

7. Rack railway - Wikipedia

   en.wikipedia.org/wiki/Rack_railway

   The Riggenbach system is similar in design to the Marsh system. It uses a ladder rack, formed of steel plates or channels connected by round or square rods at regular intervals. The Riggenbach system suffers from the problem that its fixed ladder rack is more complex and expensive to build than the other systems.