floor gully 中文意思是什麼
floor gully
解釋
地板集水溝-
Inspection devices for yards and buildings. gully tops with a clear opening lower than 200 mm. floor drains. requirements. dimensions. tests
院內和建築物用排水裝置.陰溝蓋入口低於200mm .地面彎管.特性.尺寸.試測
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