Question

Write about the use of periscope by the army people in their security
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Answer 1

Answer:

A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position

Explanation:

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Answer 2

Answer:

a periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current positive