04:24 Nov 7, 2010 |
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English language (monolingual) [PRO] Tech/Engineering - Transport / Transportation / Shipping / Trains, Railways, Railroads | |||||||
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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5 +1 | bond crossing |
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bond crossing Explanation: To understand what it is, we first to know the 'rail bond'. It is a structure connecting rail segments to conduct railway signalling currents. Pllease see the reference websites. Reference: http://www.bathtram.org/tfb/tT49.htm Reference: http://www.google.co.kr/url?sa=t&source=web&cd=4&ved=0CEkQFj... |
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