A.0.2~0.4h B.0.4~0.6h C.0.6~0.8h D.0.8~0.9h
A.10A B.9A C.11A D.8A
A.人字抱桿失效前 B.人字抱桿失效時 C.人字抱桿失效后 D.電桿立至70°