VladanS
2020-11-23T09:52:55+00:00
[img]http://img.nga.178.com/attachments/mon_201209/14/-47218_5052bc4f51be7.png[/img][img]http://img.nga.178.com/attachments/mon_201209/14/-47218_5052bc4f51be7.png[/img][img]http://img.nga.178.com/attachments/mon_201209/14/-47218_5052bc4f51be7.png[/img]开内循环就没问题。是外面的尾气吸进来吗？