Discussion About the Thickness of Protective Layer of Reinforcing Bar of Main Roof Beam in Building Roof Rib Type in In-Situ Reinforced Concrete是什么意思_Discussion About the Thickness of Protective Layer of Reinforcing Bar of Main Roof Beam in Building Roof Rib Type in In-Situ Reinforced Concrete在线翻译_英语_读音_用法_例句