The welding experiment to 1. 0mm + 1.0mm LF6 aluminium alloy sheets is carried out using a clos ed loop feedback principle.是什么意思_The welding experiment to 1. 0mm + 1.0mm LF6 aluminium alloy sheets is carried out using a clos ed loop feedback principle.在线翻译_英语_读音_用法_例句