分析硫酸吸收循环槽加水管的腐蚀问题及加水管原设计中存在的缺陷，介绍采用F4材料研制的新加水管。

This paper analyzes the corrosion problem of absorption and circulation sulfate tank and defects in original water supply pipe design, recommends a new water supply pipe developed by F4 material.

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不太发达的国家，成百万的人还住在贫民窟里，没有恰当的卫生设备，他们首先需要增加水管，更别提水库和净水措施了。

Poor countries, where millions live in slums without proper sanitation, need more pipes in the first place, not to mention reservoirs and purification works.

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游戏总共有7关，随著关数的增加水流速度会变得更快，同时开始增加蓄水管、石头、单向管道、预设管道等元素。

There are 7 levels in total. As level increasing, the flow speed become faster and faster, and there will be reservoir pipes, rocks, oneway pipes, preset pipes joined.

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游戏总共有7关，随著关数的增加水流速度会变得更快，同时开始增加蓄水管、石头、单向管道、预设管道等元素。

There are 7 levels in total. As level increasing, the flow speed become faster and faster, and there will be reservoir pipes, rocks, oneway pipes, preset pipes joined.

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