无污染能源 Non-polluting energy sources ; pollution-free energy source ; [环境] pollution-free energy ; polluting energy sources

无污染燃料 pollution-free fuel

无污染的 free of contamination ; non-polluting

无噪声污染 freedom from noise pollution

无污染工艺 pollution free technology ; [环境] non-pollution technology

无污染产品 Environmentally Friendly Product

无污染射孔 undamaged perforation

无污染漂白 non-polluting bleachoing

无水质污染 zero water pollution

无外来污染的 [生物] axenic ; axenlc