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2014-07-10T11:04:14+05:30

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1.They are used in submarine navigation to see any obstacle in the front.
2.They are used in tanks to search enemies and fire rockets and bullets at them.

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  • Brainly User
2014-07-10T11:30:49+05:30

soldiers use periscope to watch enemies when they are at trenches

while we are in underground rooms we can use periscope to watch things happening outside

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