我们沿着南塔的楼梯井爬回桥上，又发现了正在站岗的老陈，酷酷地朝我们点了点头。
We climbed the South Tower stairwell back to the bridge and found Mr. Chen again standing sentry and he proffered us a slight if somewhat cool nod.
他说他有些语法问题弄不懂，想要得到李南的帮助，他还告诉李南今年夏天来中国参观井看望李南。
He said that he had some trouble in the grammar and asked Li Nan for help. He told Li Nan that he was going to visit China and meet him in Beijing this summer.
采用CYBS系列动筒式防砂卡抽油泵，在文南油田不同井况的4口井中进行了防砂卡抽泥浆工艺的生产试验。
CYBS series anti sand travelling barrel rod pumps were used on 4 Wells in Wennan Oilfield to test their performance of sand control and slush pumping.
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