开采较高粘度的稠油，常规螺杆泵往往表现出故障率高、举升效果差。
In the light of the frequent breakdown and badly lifting efficient of using conventional screw pump recovering viscous crude.
开采较高粘度的稠油，常规螺杆泵往往表现出故障率高、举升效果差。
In the light of the frequent breakdown and badly lifting efficient of using conventional screw pump recovering viscous crude.
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