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positions above than 3th duckpunching.com

#	Keyword	Results	Change	Check Date
11	mod_rails	94 500	1	2012-05-16
20	rails "debug session"	50 800	-9	2012-06-29
41	netbeans 运行c 程序	7 800	0	2013-06-04
43	rails exists?	6 640 000	-10	2012-07-07
46	refactoring vendor rails	837 000	0	2013-11-02