齐格菲防线 (齊格菲防線) qí gé fēi fángxiàn

qí gé fēi fángxiàn proper noun Siegfried Line
Domain: History 历史 , Subdomain: Europe , Concept:
Notes: Line of German military defenses during WWI and WWII (CC-CEDICT '齊格菲防線')