24:34
Which Types of drill machine, Find the cutting speed, countersinking counterboring tapping drilling,
CITS & ITI STUDY POINT
26:58
Angle of Twist Drill ,Classification of Twist drill। Lip clearance, helix angle, chisel edge angle।
15:31
DRILL HOLDING DEVICE! Drill chuck,Drill key,Drill Drift, Drill socket ! ड्रिल होल्डिंग डिवाइस
16:26
How many parts of drill || TWIST DRILL || DRILL ALL PARTS ट्विस्ट ड्रिल बिट संबंधित जानकारी
16:45
ड्रिलऔर ड्रिल बिट Drill , Types of Drill Bit
