Electrical Engineering · Earthing and Grounding
भारतीय मानकों के अनुसार, अर्थिंग के लिए उपयोग किए जाने वाले पाइप इलेक्ट्रोड की लंबाई न्यूनतम _____ से कम नहीं होनी चाहिए।
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