water and waste water engineering  给水排水工程

Wells and well water and waste water  水井、井水及废水

Garbage and waste water treatment  垃圾与污水处理

Industrial gas and waste water  硫化物

metro and waste water tunnel  地铁与污水隧道

Research Institute for Water-and Waste Management  德国科隆水和废物研究公司FiW

split flow of clean and waste water  清污分流

Waste Water and Gas  废水废气

waste water and residue) treatment  三废治理

water and waste engineering  给排水工程

Drinking water and water source  饮用水及水源水

projects in water conservancy and water and electr  水利水电工程

Water and Water Steam  水和水蒸气

acetylene purification waste water  乙炔清净废水

Acid and alkali waste water  酸碱性废水; 酸碱废水

Acid copper-containing waste water  酸性含铜废水

acid cyanogen-bearing waste water  酸性含氰废水

acid industrial waste water  工业酸性废水

acid mining waste water  酸性矿坑水