Tuesday, 2 January 2018

The included angle of the counter sinking portion of center drill of type 'B' used for protecting the centre hole is....

The included angle of the counter sinking portion of center drill of type 'B' used for protecting the centre hole is....
A) 90degree
B) 75degree
C) 120degree
D) 100degree


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Location: Tiruchirappalli, Tamil Nadu, India

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