17 Must keep the concentration of PF-PLUS over 2.85 kg/m3 in mud.
17 Must keep the concentration of PF-PLUS over 2.85 kg/m3 in mud.
应保持泥浆中PF－PLUS的最小浓度为2.85公斤/方。
17 Must keep the concentration of PF-PLUS over 2.85 kg/m3 in mud.
应保持泥浆中PF－PLUS的最小浓度为2.85公斤/方。