Corrosion resistant cylinder construction includes epoxy coating on the head, cap and gland, all of which are cast iron.
耐腐蚀的缸体结构包括在顶部、盖和密封装置上增加环氧涂层，并且全为铸铁材质。
While DC power transmission requires high anti-fouling property for insulators and causes serious corrosion to their metal attachments (iron cap 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。
The valve stem and sealing surfaces are completely protected from dirt and corrosion by the stem cap, whether the valve is in an open or closed position.
不管是在阀门开启位置，还是关闭位置，阀杆和密封面有阀杆盖帽的保护，能防止污物入内，防止腐蚀。
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