Question #12417
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What is the formula to find out core diameter of external thread by using prisms and micrometer?

A.
Core dia = Measurement over prisms ? Height of prisms ? Single depth of thread
B.
Core dia = Measurement over prisms ? Height of prisms + Two depth
C.
Core dia = Measurement over prisms + Height of prisms ? Single depth
D.
Core dia = Measurement over prisms ? Height of prisms + Single depth
Explanation

No explanation provided.