系列品种价格5月7日5月8日涨跌精梳系列J21支24200242000JM21支24500245000JMS21支24900249000JMS20支24800248000JMS32支26400264000J26支24700247000J30支25100251000J32支25600256000J36支26400264000J40支26900269000JM2