_ The included angle for the British standard whitworth thread is$? – McqOptions

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1.	_ The included angle for the British standard whitworth thread is$?
A.	29¬¨‚àû
B.	47.5¬¨‚àû
C.	55¬¨‚àû
D.	60¬¨‚àû
Answer» D. 60¬¨‚àû

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