北京绿岛风分体式管道换气扇90度拐角(节能静音型)DPT10-11-20S，DPT10-11-25S，DPT15-23H35，DPT15-33H45，DPT15-33H55北京绿岛风分体式管道换气扇90度拐角(节能静音型)DPT10-11-20S，DPT10-11-25S，DPT15-23H35，DPT15-33H45，DPT15-33H55