See our piece on the boston water-main break for tips on emergency water storage and purification .
请查阅我们关于波士顿供水管道破裂应急水储存和净化水技巧的文章。
We might work on small-scale engineering projects , from water purification technologies to micro-solar panels .
我们可以参与小型工程项目,比如水的纯化技术或者微型太阳能电池板等等。
So n-solv introduced purification equipment to separate methane from the propane before it is reused . The separated methane can also be used to heat the propane , further reducing energy costs .