A.0.4級,16MPa; B.0.6級,10MPa; C.0.25級,10MPa;
A.導(dǎo)壓管路密封性不好 B.導(dǎo)壓管堵塞; C.通大氣一端堵塞
A.0.016MPa; B.0.017MPa; C.0.015MPa;