Due to structure needed, Anti-impact stroke is one of the important factors that have great influence on the pump efficiency of high-gas-contained oil well.
由于结构需要，抽油泵的防冲距是高含气井中影响泵效的重要因素之一。
Due to structure needed, Anti-impact stroke is one of the important factors that have great influence on the pump efficiency of high-gas-contained oil well.
由于结构需要，抽油泵的防冲距是高含气井中影响泵效的重要因素之一。
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