齐格菲防线

qí gé fēi fáng xiàn

Siegfried Line, line of German military defenses during WWI and WWII

(name of states and dynasties at several different periods)

square

fēi

abbr. for the Philippines 菲律賓|菲律宾[Fei1 lu:4 bin1]

fáng

to protect

线

xiàn

variant of 線|线[xian4]