請問綠色警示帶下面是什麼 - 土木

By Ina
at 2010-06-23T19:26
at 2010-06-23T19:26
Table of Contents
我知道藍色警示帶下面是自來水
紅色 瓦斯
那綠色是?
--
紅色 瓦斯
那綠色是?
--
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