A.0.25MPa B.0.30MPa C.0.35MPa D.0.45MPa
A.無(wú)漏風(fēng) B.無(wú)漏油 C.有漏油返油 D.無(wú)漏風(fēng)、漏油返油
A.0.2mm B.0.3mm C.0.4mm D.0.5mm