早期投产的国产200MW机组因设备老化，其外置式疏水冷却器经常会产生汽侧筒体被蒸汽吹蚀及钢管泄漏等故障，影响了机组的安全运行和经济效益。
External drain coolers often leaks from the steam blowed barrel or tubes of the early 200MW units, which have an effect on safe and economic operation of the units.
一种新型外置式手机天线，涉及电子通讯设备技术领域。
The utility model relates to a new external type mobile telephone antenna which relates to the technical field of electronic communication devices.
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