guest Moderator 管理成员 注册 2002-10-07 消息 402,305 荣誉分数 76 声望点数 0 2016-05-17 #1 Tiny, needle-like ice crystals known as "frazil ice" are causing big problems at one of Ottawa's two water purification plants, and could cost taxpayers millions of dollars to combat, city councillors heard Tuesday. 查看原文...
Tiny, needle-like ice crystals known as "frazil ice" are causing big problems at one of Ottawa's two water purification plants, and could cost taxpayers millions of dollars to combat, city councillors heard Tuesday. 查看原文...
