Technician A says that the same recovery unit can be used for R-12 and R-134a. Technician B says that the service hoses from an R -134a recovery unit must have shutoff valves within 18 inches of the end. Who is correct?
A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B
D) Neither technician A nor B
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