A.1:1 B.0.5% C.20% D.0.5mg/L
A.機(jī)械式壓力計(jì)測試和電子壓力計(jì)測試 B.井下流量計(jì)測試和投球測試 C.投球測試和電子壓力計(jì)測試 D.井下流量計(jì)測試和電子壓力計(jì)測試