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Terms for subject Oil and gas containing 用于 | all forms | in specified order only
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用于低温井地层温度波特兰水泥硅酸盐水泥портланд цемент для "холодных" скважин
用于高温井地层温度波特兰水泥硅酸盐水泥портланд цемент для "горячих" скважин

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