171期特围（{01,07,10,13,15,17,18,19,20,21,24,25,26,27,28,32,36,40,41,43,44,45,46,47}）开28准
172期特围（{02,04,05,07,11,14,18,19,20,23,25,26,28,30,31,33,37,38,40,41,43,46,48,49}）开44错
173期特围（{01,03,05,06,10,12,13,16,20,21,25,26,27,30,32,36,37,39,40,41,43,44,46,49}）开26准
174期特围（{01,03,05,06,09,10,12,16,17,20,21,22,27,30,32,33,34,36,38,39,44,45,47,48}）开41错
175期特围（{02,05,06,07,08,10,16,21,22,24,25,26,27,29,33,35,37,38,39,43,45,47,48,49}）开？中