उद्देश्य - "लोहे पर नमी तथा वायु के प्रभाव का अध्ययन करना।" upar photo Diya hai uske aadhar par avlokan sarni banaiye..plz help me...Kal Mera practical h
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I dont understand this language ..!!
or pic kidhr hai ??
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Explanation:
ℎ ℎ ℎ ℎ
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