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POS
CIDE DICTIONARY
block of metal | block off | block out | block plane | block signal | block system | block tin | block up | block vote | blockade | blockade-runner

block system

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 : 
Noun Phrase

CIDE DICTIONARY

block system,  
     A system by which the track is divided into short sections, as of three or four miles, and trains are so run by the guidance of electric, or combined electric and pneumatic, signals that no train enters a section or block until the preceding train has left it, as in absolute blocking, or that a train may be allowed to follow another into a block as long as it proceeds with excessive caution, as in permissive blocking.  [Webster 1913 Suppl.]

For further exploring for "block system" in Webster Dictionary Online


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