The analysis of the failure of deformed bellow expansion joint of town gas power pipeline network in service found that the deformation of the bellows were mainly caused by installation error and ground settlement.是什么意思_The analysis of the failure of deformed bellow expansion joint of town gas power pipeline network in service found that the deformation of the bellows were mainly caused by installation error and ground settlement.在线翻译_英语_读音_用法_例句