Technician A says the first angle cut conventionally is the throat. Technician B says sometimes valve seat angles (3) are cut at the same time with a special cutter. Who

Technician A says the first angle cut conventionally is the throat. Technician B says sometimes valve seat angles (3) are cut at the same time with a special cutter. Who is correct?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

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