A.±80mm B.±20mm C.±5mm
A.1/10451 B.-1/10451 C.1/10450
A.fι=aι+bι+cι-180ι° B.fι=180°-aι-bι-cι C.fι=│aι+bι+cι│-180° D.fι=180°-│aι+bι+cι│