機器
1st
attraction
battle
battlefield
bunker
casemate
concrete
construction
copula
danger
defense
dome
douaumont
emplacement
europe
field
first
forest
fort
fortification
fortress
france
french
front
gun
iron
landmark
lookout
lorraine
metal
military
observation
one
outdoor
point
post
protection
security
shelter
sky
steel
tourism
turret
verdun
vertical
war
warfare
world
ww1