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| Re: Fourth Rails and Safety (832202) | |||
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Re: Fourth Rails and Safety |
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Posted by chuchubob on Fri Sep 11 19:36:38 2009, in response to Re: Fourth Rails and Safety, posted by MGL on Fri Sep 11 19:30:45 2009. There are two running rails, a power rail, what exactly is the purpose of this fourth rail?Two power rails, like trackless trolleys have two power wires; the running rails are not used as an electrical ground. |
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