[請益] 請問這是什麼東西？
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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謝謝前輩們不吝嗇告知，謝謝！
※ 編輯: AlexChen 來自: 114.35.30.78 (09/21 17:19)
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