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The test stand prepares the ground for a through investigation into drill pump valves.
试制的实验室用泵阀试验台为深入开展钻井泵泵阀的理论研究创造了条件。
youdao
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The test stand prepares the ground for a through investigation into drill pump valves.
试制的实验室用泵阀试验台为深入开展钻井泵泵阀的理论研究创造了条件。
youdao