underwater periscope
periscope view
periscope lens
periscope camera
periscope system
periscope function
periscope design
periscope operation
periscope technology
periscope mechanism
the submarine used a periscope to see above the water.
he adjusted the periscope to get a better view.
periscopes are essential for underwater navigation.
they designed a new periscope for the research vessel.
the periscope allowed them to spot enemy ships.
children love to play with toy periscopes.
using a periscope can enhance your observation skills.
he peered through the periscope to check the surroundings.
periscopes can be found in many military submarines.
the periscope's lens was damaged during the mission.
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