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买:cross(M55,M34) and M34 M13 and M13
卖:=cross(M7,M13) and M55 M34 and M34
买1:cross(m13,m7) and 年线 M13 AND M7
买2:cross(m55,m7) and 年线 M13 AND M13
xg:cross(年线,m55) and m55 m13 and m13
买3:CROSS(M55,M13) AND 年线 M55 AND M13