1.

What must be the velocity of the carrier gas that carries the abrasive particles?

A. 10 – 50 m/sec
B. 50 – 150 m/sec
C. 150 –300 m/sec
D. 300 – 500 m/sec
Answer» D. 300 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 500 m/sec


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