請問這是什麼東西? - 土木

By Michael
at 2011-09-21T15:19
at 2011-09-21T15:19
Table of Contents
照片:如以下網址
http://bbs.civilgroup.org/viewtopic.php?t=7285
版上前輩們您好!
請問那【白白】的東西是什麼呢?保麗龍球?
剛剛後學觀看隔壁大樓施工,版上鋼筋內放置白白圓球狀的東西?
感覺很好奇,不知道那是什麼東西?又有何作用呢?
麻煩不吝嗇告知,謝謝!
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歲寒松柏古栽培,雨雪風霜總不摧,
異日必當成大用,功名作個棟樑材。
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