246期 两元开始3d大底
条件：独胆4，和值12至22，跨度0至5，
大底21注：444.445.455.446.465.466.447.475.476.477.
448.485.486.487.488.449.495.496.497.498.499.
精选：445.455.447.457.467.477.
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条件：独胆4，和值12至22，跨度0至5，
大底21注：444.445.455.446.465.466.447.475.476.477.
448.485.486.487.488.449.495.496.497.498.499.
精选：445.455.447.457.467.477.