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世博结束后,世博园区的环卫服务标准已成为中国环境服务业的经典样板。10米为半径的圆形范围内20分钟只能出现3个点状物、硬隔离带采取分流
After the Expo, the sanitation service standards of the Expo Site have become the classic model of China’s environmental service industry. 10 meters radius of the circular range of 20 minutes can only appear 3 points, the hard isolation to take diversion