long-stroke chain pumping unit
long-stroke chain pumping unit
长冲程链式抽油机
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The crank-chain driving and long stroke pumping unit described in this papes is a new type of pumping unit.
曲柄链条动滑轮式长冲程抽油机是一种新型抽油机。
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The cylinder chain lower super long stroke pumping unit is a kind of up to date and high efficiency equipment.
圆柱链低矮式超长冲程抽油机是一种新型高效有杆采油设备。
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