衬环,托圈,垫环 backing ring的用法和样例：例句An investigation was made into one

中文解释

分析了炼钢转炉托圈连接螺栓早期断裂的原因。

正在查询

MPX Lactuca 争相 吃香 tremor endure to recall a certain incident departmentally wield the authority touch greatly