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原文：
Recent rains caused the South to the continued strength of the waterlogging phenomenon occurs in many cities, but in Ganzhou City, Jiangxi Province, a 900 years ago the construction of drainage ditches has been repeatedly made this same storm hit the ancient city intact. Despite heavy rain the past few days Jiangxi suffered Check Valves invasion, but it seems Gan fuzhoucheng not be affected, even the streets can not see any traces of water. 【Jiangxi Ganzhou municipal administration deputy director of the Conservation Department, Drainage Zhou Guiming: Longevity in this region occurred in waterlogging ditch it? Never happened waterlogging. 】 According to reports, Ganzhou never happen waterlogging, thanks to a drainage ditch known as longevity, this ditch was built in the Song though has 900 years of history, but has stillButterfly Valves bear the old city of Ganzhou, sewage, drainage function. Under the leadership of the staff, this reporter went into the construction of the sewer Song. Fushou ditch about 1 km, arched, due to maintenance properly, even the brick walls are kept very well. Although the age-old, but longevity has not been a big ditch maintenance. Historical records, Ganzhou three facing water, often before the floods in the Song Dynasty, but since the construction of a ditch after longevity, this ancient city on the rare occurrence Plug Valves of waterlogging. Ditch the Principles of Longevity is not complicated, in connection Jiang tribute a valve installed on the outfall, when waterlogging occurs when the impulse to open the valve the water will automatically discharged to the river Gong, Jiang's position once the tribute over valves, valve will automatically close, preventing back flow. 【Jiangxi Ganzhou municipal administration deputy director of the Conservation Department, Drainage Zhou Guiming: / / longevity is based on communication with residents of the terrain that has some slope, (for drainage) play an important role. The drainage facilities, it has never needed to rely on Balance Valves what mechanical forces on the drainage, it can go with the flow. 】 Designed to be scientific and rational as to the current rainfall and sewage treatment capacity, if additional three or four times, longevity, communication can also be Forged Steel Valves comfortable with. Xinhua News Agency reported.
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译文：国内骨干阀企参展国际石油天然气展会
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