11. In January, a drilling machine was drafted into service. 12. Generally, all magnetic drilling machines have brush DC motor. 13. Most shallow well drilling machines are mounted on large trucks, trailers, or tracked vehicle carriages. 14. It plays a very important role on performance and life of the magnetic drilling machines . 15. This process can happen on a deep hole drilling machine or a dedicated skiving machine. 16. Thanks to these drilling machines , bed-ridden patients could simply undergo treatment at home or in hospital. 17. An oil bath gearbox is considered to be the heavy duty gearbox for magnetic drilling machines . 18. Machinery equipment consisted of the 44 lathes, 11 planers, 4 chiselings, 24 drilling machines and others. 19. This included factories in United States, China, Japan making above ground rotary blasthole and deephole drilling machines . 20. In a new innovation for Queensland several kinds of drilling machines were experimented with but all failed.
