_________________ is a rotary drill and it consists of steel pipe stem – McqOptions

MCQOPTIONS

1.	_________________ is a rotary drill and it consists of steel pipe stem on the bottom of which is attached to a roller bit.
A.	Blasthole
B.	Diamond
C.	Shot
D.	Percussion
Answer» B. Diamond

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_________________ is a rotary drill and it consists of steel pipe stem on the bottom of which is attached to a roller bit.