While DC power transmission requires high anti-fouling property for insulators and causes serious corrosion to their metal attachments (ironcap and steel foot).
但直流输电对绝缘子的防污秽性能要求高，对其金属附件(铁帽和钢脚)腐蚀厉害。
2
The submersible motor enclosure including frame, end brackets, flanges and cap assembly shall be constructed of close-grained cast iron, ASTM A-48, Class 30 or better.
潜水电机壳体，包括机架，尾轴承架，法兰和罩盖总装，必须采用符合美国材料试验协会ASTM A - 48类别30标准的、密实的铸铁或更好的材料制造。
3
This company produces engineering machinery, automobile, engine, cast iron pipe and so on casting. Produc demonstration: clamp, planet Rack, Support, bearing cap, cast iron pipe, Products and so on.