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It is carried out by using some lumps and a set of especial guiding boring-hole device. This method is easy and convenient.
提出了联合使用量块和一套导向镗孔装置的解决方案。
youdao
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It is carried out by using some lumps and a set of especial guiding boring-hole device. This method is easy and convenient.
提出了联合使用量块和一套导向镗孔装置的解决方案。
youdao