单项选择题
A.30mm B.100mm C.50mm D.150mm
A.门槛石 B.墙面瓷砖 C.阳露台瓷砖 D.卫生间瓷砖
A.500~600mm B.300~600mm C.400~600mm D.350~600mm
A.φ6 B.φ8 C.φ10 D.φ12
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