A.效率高 B.經(jīng)濟(jì)性差 C.結(jié)構(gòu)復(fù)雜 D.自動(dòng)適應(yīng)性能好
A.20° B.10° C.15° D.30°
A.14,μm B.14,mm C.12,μm D.12,mm