bolting down
bolting together
bolting mechanism
nuts and bolts
anchor bolt
lightning bolt
rock bolt
high strength bolt
screw bolt
bolt upright
bolt hole
roof bolt
bolt connection
bolt out
bolt on
bolt joint
stud bolt
joint bolt
foundation bolt
expansion bolt
fixing bolt
bolt head
Description is made on the principle and application result of the short group bolting of slushing roadways in loosened rock.
Safety effective of metal forepole support was analyzed in beam and bolting with wire mesh,problem and improvement was given safety effective was ensured.
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