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在民用建筑施工中,设计规定,圆孔楼板两端的孔洞要用红砖堵上(见图1)。堵孔的目的是为了在浇
In the construction of civil buildings, the design regulations stipulate that the holes at both ends of the round-hole floor shall be blocked with red bricks (see Figure 1). The purpose of plugging holes is to pour