文章着重探讨了燃气管道与地铁的安全距离、地铁杂散电流的危害和防护。
The article discusses on the safe distance between gas pipeline and metro rail, the hazards of metro stray current and protection measures.
且具有旋流室和中心抽气管和带多喷孔的散流锥。以此获得较理想的喷雾效果。
It has swirling flow chamber, central air exhausting pipe and fluid scattering cone with multiple orifices to obtain an ideal atomizing effect.
分析了地铁直流杂散电流对埋地燃气管道干扰腐蚀的机理与影响，并简述了埋地燃气管道直流杂散电流干扰腐蚀的防护方法。
The mechanism and influence of subway stray current corrosion on buried metal pipeline is analyzed, and the measure of disturbing stray current corrosion is narrated briefly.
细支气管肺泡细胞癌易与肺部感染、浸润型肺结核和血行播散型肺结核等误诊。
It is usually misdiagnosed as pulmonary infection, infiltrative pulmonary tuberculosis and hematogenous pulmonary tuberculosis.
细支气管肺泡细胞癌易与肺部感染、浸润型肺结核和血行播散型肺结核等误诊。
It is usually misdiagnosed as pulmonary infection, infiltrative pulmonary tuberculosis and hematogenous pulmonary tuberculosis.
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