If worm helix angle is 30‚Äö√Ñ√∂‚àö√ñ‚Äö√†� – McqOptions

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1.	If worm helix angle is 30‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ª, then worm should have at least ___ threads.$
A.	5
B.	6
C.	7
D.	8
Answer» B. 6

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