14 5 mm
4 tube
air force
anti aircraft guns
automobile
aviation
base
biaxial
broom
car seat
children s palace
china
color images
display
during the day
education
exhibition
four wheel
ground forces
gun rack
guns
history
military
military equipment
museum
national defense
outdoors
patriotism
revolution
science
sights
sky zpu anti aircraft guns
suzhou
the air combat and air defense
the people s liberation army
the soviet union
war
weapons
youth