Lock mechanism on a blast door in a heavy-duty airlock of a concrete fallout shelter or survival bunker designed for emergencies. Selective focus.
Palabras clave
lock,
mechanism,
blast,
door,
heavy duty,
air lock,
concrete,
fallout,
shelter,
survival,
bunker,
emergency,
selective,
sharpened,
security,
protection,
isolation,
resilience,
design,
architecture,
safety,
preparedness,
fortification,
equipment,
technology,
engineering,
durability,
access,
entry,
barrier,
confinement,
storage,
structural,
reinforcement,
functionality,
industrial,
emergency,
escape,
construction,
robust,
defense
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