In addition, seal-less centrifugal pumps can be used for the first and second reactors in the coal direct liquification process.
另外，煤直接液化过程中，第一、第二反应器应选用无密封式的离心泵。
In addition, seal-less centrifugal pumps can be used for the first and second reactors in the coal direct liquification process.
另外，煤直接液化过程中，第一、第二反应器应选用无密封式的离心泵。
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