roof hole顶部: top; upper apex; top half; h ...的: 4次方是 The fourth power of 2 i ...钻孔: drill; bore; drill hole perf ...顶部的: topping取心的钻孔: cored hole下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:顶部的钻孔，即可在微信中查询翻译
