短语词组短語bulb angle bar 圓頭角料;繙譯;圓邊角型鉄料bulb flat bar 球扁鋼T -bulb-bar 球緣形材bulb angle -bar 球緣角鋼tee bulb bar 球緣bulb bar steel 圓邊圓鉄plain bulb bar 球緣扁材bulb -tee bar 丁字形球緣材 返回 bulb bar