| Liergerty | Дата: Четверг, 06.03.2014, 02:40 | Сообщение # 1 |
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| The various surfaces and the air inside a building are constantly interacting, and this interaction results in changes in each. For example, we may see a window as changing slightly over time as it becomes dirty, then is cleaned, accumulates http://reconstruct.net76.net dirt again, is cleaned again, and so on through its life. In fact, the “dirt” we see may be evolving as a result of the interactions among the moisture, chemicals, and biological materials found there.
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