निम्न में से भूकम्पमापी यं – McqOptions

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1.	निम्न में से भूकम्पमापी यंत्र कौन सा है -
A.	गीगर काउन्टर
B.	सीस्मोग्राफ
C.	रेनग्रेज
D.	क्रैस्कोग्राफ
Answer» C. रेनग्रेज

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