Physics · Acoustics
वह कौन-सा उपकरण है जो समुद्र की गहराई मापने के लिए पराश्रव्य (अल्ट्रासोनिक) तरंगों का उपयोग करता है?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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