What Are Some Examples Of A Periscope?

1.	What Are Some Examples Of A Periscope?
Answer» It is an optical INSTRUMENT for viewing objects, which are above the level of DIRECT SIGHT; mostly USED in submarines. It is an optical instrument for viewing objects, which are above the level of direct sight; mostly used in submarines.

Answer»

It is an optical INSTRUMENT for viewing objects, which are above the level of DIRECT SIGHT; mostly USED in submarines.

It is an optical instrument for viewing objects, which are above the level of direct sight; mostly used in submarines.

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