单词：SSR cementing system
水下释放塞注水 泥系统
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天天商务口语
I signed an order last night to BP and about 8:30 eastern daylight time this morning they started pumping cement into the well. They will do that throughout the day. When that is done I'll make sure they have all the cement in place where it needs to
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夏说英语新闻晨读