The Image Of Londons Dramatic Tower Bridge Is So Famous That It Is Often Mistakenly Thought Of As London Bridge Tower Bridge Completed In 1894 Is An Unusual Combination Of Suspension Bridges On The Land Side Of The Towers And Dual Bascule Spans In The Center As With The Many Bascule Bridges In St Petersburg Russia And Over The Chicago River Moving This Weight-Balanced Roadway Requires Comparatively Little Energy Making It Very Efficient For Allowing River Traffic To Pass Tower Bridges Original Hydraulic Accumulators Were A Significant Advance In Storing The Energy Required To Be Able To Open The Two 1000 Ton Bascules In Only Five Minutes Solid Long-grain Copper (c) Conductors Solid Conductors Eliminate Strand-Interaction Distortion Evergreens Solid Long-grain Copper Allows A Smoother And Clearer Sound Than Cables Using Regular Ofhc (Oxygen-Free High-Conductivity) Copper Ofhc Is A general Metal Industry Specification Regarding Loss Without Any Concern For Distortion c Has Fewer Oxides Within The Conducting Material Less Impurities Less grain Boundaries And Definitively Better Performance Foamed-Polyethylene Insulation Any Solid Material Adjacent To A Conductor Is Actually Part Of An Imperfect Circuit Wire Insulation And Circuit Board Materials All Absorb Energy (Loss) Some Of This Energy Is Stored And Then Released As Distortion Tower Uses Air-Filled Foamed-Polyethylene Insulation On Both Conductors Because Air Absorbs Next To No Energy And Polyethylene Is Low-Loss And Has A Benign Distortion Profile Thanks To All The Air In Foamed-Pe It Causes Much Less Of The Out-Of-Focus Effect Common To Other Materials Metal-Layer Noise-Dissipation System (Nds) 100% Shield Coverage Is Easy Preventing Captured Rf Interference From Modulating The Equipments ground Reference Requires Aqs Noise-Dissipation System Noise-Dissipation System Prevents A Significant Amount Of Rfi From Reaching The Equipments ground Plane
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