短语词组短语camber beam 曲线梁;弯梁;弯曲梁;曲梁connect camber beam 连接弯梁camber of beam 梁拱;梁弧高梁拱高;梁孤高camber -beam [建]弓背梁thin wall camber box beam 薄壁曲线箱梁 返回 beam camber