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词汇 backing ring
释义 backing ring
基本例句
衬环,托圈,垫环
An investigation was made into one of the self-adjustable boltsconnecting the converter trunnion ring in a steel-mill which broke after being in service for 13 months.分析了炼钢转炉托圈连接螺栓早期断裂的原因。
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