单项选择题
A.≥300mm B.≥100mm C.≥500mm D.≥50mm
A.≥30mm B.≥100mm C.≥80mm D.≥50mm
A.膨胀砂浆 B.膨胀混凝土 C.膨胀止水条 D.涂膜防水
A.50mm B.100mm C.200mm D.300mm
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