गैल्वेनाइज्ड लोहे के पाइप – McqOptions

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1.	गैल्वेनाइज्ड लोहे के पाइप पर परत होती है -
A.	जस्ते की
B.	पारे की
C.	लेड की
D.	क्रोमियम की
Answer» B. पारे की

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