湖泊、溪流或海岸一旦遭受粪便细菌的污染，接触这些水域的人就等于 冒 著感染的风险，因为这些微生物会经由口、鼻、眼睛或外在伤口进入人体。
If fecal organisms contaminate a lake, stream or seashore, anyone in the water risks infection by microbes entering through the mouth, nose, eyes or open wounds.
保持最下一层空场出矿分段的进路端部出矿口不敞空，防止冒落冲击危害。
Then, it is to remain some blasted ore to block the drift outlet at the last mining level to prevent the impact of air flows induced by the rock falling.
阐述了轮类铸铁件采用新颖的压边浇（冒）口铸造工艺的优化设计指导理论和技术要点，简评了压边浇（冒）口铸造工艺在轮类铸铁件上应用所获得的良好技术经济效果。
The basic theory and technical points of a new kind of lap gate(riser)adopted to produce iron castings of wheels are discussed and good economic results of this technology in production are also…
阐述了轮类铸铁件采用新颖的压边浇(冒)口铸造工艺的优化设计指导理论和技术要点，简评了压边浇(冒)口铸造工艺在轮类铸铁件上应用所获得的良好技术经济效果。
The basic theory and technical points of a new kind of lap gate (riser) adopted to produce iron castings of wheels are discussed and good economic results of this technology in product...
阐述了轮类铸铁件采用新颖的压边浇(冒)口铸造工艺的优化设计指导理论和技术要点，简评了压边浇(冒)口铸造工艺在轮类铸铁件上应用所获得的良好技术经济效果。
The basic theory and technical points of a new kind of lap gate (riser) adopted to produce iron castings of wheels are discussed and good economic results of this technology in product...
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