The invention can express minutes in the fourth digit by using the E part, moreover it is compatible with all of CD formats backward.
本发明不但可以用E部分表示分的百位数以上，更可以反向与所有的CD格式兼容。
Compared with traditional digit-analog converter, the invention has simple structure, quick conversion speed. The merit is superior especially for relatively more conversion signal digit.
相比于传统的数模变换器，本发明结构简单，转换速度快，在转换信号位数较多时此种优势更加明显。
The invention relates to an oil well sheath repair method and digit control lathe.
本发明公开一种油井套管修复方法及数控机床，属于油田设施现场维修技术领域。
The invention relates to an oil well sheath repair method and digit control lathe.
本发明公开一种油井套管修复方法及数控机床，属于油田设施现场维修技术领域。
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