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人工井壁
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artificial wellbore
人工井壁
从地面将支护剂和未固化的胶结剂按一定比例搅合均匀,用携砂液带入地层,挤入油层出砂部位,形成的具有一定强度和渗透性的人工壁面。
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public relations of non-governmental organizations
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public relations practitioner、 PR men、PR officer
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Public Relations: Strategies and Tactics
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