铁路信号分为哪两类

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select * from tbl_Articles WHERE ArticleID=206147 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=206147 LIMIT 0,1
select * from tbl_Articles_sphinx where id=206147 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(601556,2474267,246869,1313007,288848,1075586,1900468,629355,221297,201812,1127567,400711,211479,2106393,631146,141633,1807960,1123398,2781662,2944777,1084471,138048,1469433,520984,1056440,476922,3025262,1345316,1554997,1782937) ORDER BY field (ArticleID,601556,2474267,246869,1313007,288848,1075586,1900468,629355,221297,201812,1127567,400711,211479,2106393,631146,141633,1807960,1123398,2781662,2944777,1084471,138048,1469433,520984,1056440,476922,3025262,1345316,1554997,1782937)