'Drill speed is measured in these; Dr. Morrison's in 1871 did about 600, today's turbine-powered ones about 300,000'
RPMs
AT THE DENTIST'S OFFICE: Drill speed is measured in these; Dr. Morrisons in 1871 did about 600, todays turbine-powered ones about 300,000
Drill speed is measured in these; Dr. Morrison's in 1871 did about 600, today's turbine-powered ones about 300,000
Drill speed is measured in these; Dr. Morrison's in 1871 did about 600, today's turbine-powered ones about 300,000
AT THE DENTIST'S OFFICE
RPMs
AT THE DENTIST'S OFFICE