low-permeability and undeveloped oil-bearing reservoirs
...-molecular-weight heparin calcium 低分子肝素钙 low-permeability and undeveloped oil-bearing reservoirs 低渗透难动用储量 low-permeability oilfield 低渗透油田 ..
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low-permeability and undeveloped oil-bearing reservoirs
低渗透、未开发的含油油藏
以上为机器翻译结果，长、整句建议使用 人工翻译 。