名词
中文翻译：备用法兰
同义词：
['backup ring', 'backup sleeve例句：1. The engineers were busy installing the backup flange on the machine.（工程师们忙于在机器上安装备用法兰。）']
例句：
-
1. The engineers were busy installing the backup flange on the machine.
工程师们忙于在机器上安装备用法兰。
-
2.The technician had to replace the damaged backup flange with a new one.
技术员不得不用一个新的备用法兰来替换损坏的。
-
3. The construction crew was working on the back side of the building to install the backup flange.
建筑工人正在建筑物的背面安装备用法兰。