appurtenant works 中文意思是什麼
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With the rapid development of urban construction, the protection of water environment is more and more important and the waste water treatment establishment has been gradually completed. and it brings a lot of data of sewage pipe network and appurtenant works
目前我國城市建設發展迅速，城市水體保護越來越受到重視，相應的污水處理設施也越來越完善，污水管網及其附屬設施的信息量越來越大。
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