A.質(zhì)量檢查 B.除銹 C.保溫 D.試壓
A.0.3-0.4m B.0.4-0.5m C.0.5-1m D.1-1.2m
A.0.6-1.2m B.2.5-4m C.4-5m D.4.5-6m