General Studies · Workshop Technology
ऑयल होल ड्रिल (oil hole drill) का प्राथमिक अनुप्रयोग क्या है?
- 1काउंटरसिंकिंग छेद
- 2मौजूदा छेद को बड़ा करना
- 3पतली चादरों की ड्रिलिंग
- 4गहरे छेद की ड्रिलिंग (Deep hole drilling)✓
सही उत्तर देखें
गहरे छेद की ड्रिलिंग (Deep hole drilling)
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