过渡套2与过滤体3之间外圆分界线焊接连接。
The circular boundary between the reduction sleeve 2 and the filter body 3 are welded.
定位套1与过渡套2之间外圆的分界线焊接连接。
The circular boundary between the positioning sleeve 1 and the reduction sleeve 2 are welded.
介绍一种新型7：24锥柄用过渡套的结构特点和工作原理，并提出了其使用价值和应用前景。
The article introduces the structure feature and working principle of a new type Reduction Sleeves with 7:24 taper and indicates its use value and application prospect.
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