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Periscope (Science Dictionary)

Periscope: An instrument that has angled mirrors or prisms and allows objects not in the direct line of sight, to be seen. It is often used on submarines and in the military.

_ ស្វែងរកឬបកប្រែពាក្យផ្សេងទៀតនៅប្រអប់នេះ៖
ឯកសារការងារនិងរៀនគ្រប់ប្រភេទ៖​
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