[問題] 想請問打穿牆壁的問題???
小弟非土木、建築科班出身
家中有一面牆壁想要打穿，打出一個洞作為小門使用!
要如何才能知道牆面中是否有水管、糞管、電線管路的存在呢??
怕貿然打穿，造成無法挽回的後果???
希望版上的高手能為我解惑???
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