Portable Sampling Drill QY-3 was developed to meet the requirements of generally geological survey.

3型轻便取样钻机是为满足地质大调查的需要而研制的。

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Portable Sampling Drill QY-3 was developed to meet the requirements of generally geological survey.

3型轻便取样钻机是为满足地质大调查的需要而研制的。

youdao