A.120°10′ B.130°30′ C.317°10′ D.37°10′
A.1/100或1/50 B.1/200或1/500 C.1/500或1/1000 D.1/1000或1/2000
A.39、40帶 B.40、41帶 C.20帶 D.38、39帶