Practice proved that adding chemicals not only decreases the viscosity of crude but also the back pressure of well head decreased.
实践证明，掺污水加药既可以降低原油粘度，又可以有效地降低井口回压。
Practice proved that adding chemicals not only decreases the viscosity of crude but also the back pressure of well head decreased.
实践证明，掺污水加药既可以降低原油粘度，又可以有效地降低井口回压。
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