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[单选题]
砖砌平拱过梁的灰缝应砌成楔形缝。灰缝宽度,在过梁底面();在过梁的顶面不应大于15 mm。拱脚下面应伸入墙内不小于20 mm,拱底应有1%起拱。
A.不应大于5 mm
B.不应小于5 mm
C.不应大于10 mm
D.不应小于10 mm
查看答案
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A.不应大于5 mm
B.不应小于5 mm
C.不应大于10 mm
D.不应小于10 mm
A.5mm;10mm
B.10mm;15mm
C.5mm;15mm
D.10mm;20mm
A.15mm
B.20mm
C.25mm
D.30mm
A.5mm
B.6mm
C.7mm
D.8mm