A blue discharge (also known as a "blue ticket") was a form of administrative military discharge formerly issued by the United States beginning in 1916. It was neither honorable nor dishonorable.
网络释义
1、吊蓝
... 蓝本德棉(美国产) Blue Bender cotton 吊蓝 blue discharge 蓝亚麻(比利时产) blue flax ...