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What is a Conical Helix ?
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#helix
#conicalhelix
#engineeringdrawing
#engineeringdrawingenglish
#BEFirstyear
#btechfirstyear
#helix
#conicalhelix
#engineeringdrawing
#engineeringdrawingenglish
#BEFirstyear
#btechfirstyear
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