向左平移π/6后,f(x+π/6)=sin[ω(x(+π/6)+φ]=sin(ωx+ωπ/6+φ)=f(x)=sin(ωx+φ)
so:ωπ/6=2kπ,k属于整数 即 ω=12k
so |ω|min=12