1. A new compressor and diamond drills were installed, and 250 men were employed. 2. He drilled his first diamond drill core hole in 1890 in northern Minnesota. 3. In 1978 Pope formed US Synthetic, a company that manufactures diamond drill bits. 4. In 1975, the Chicago Pneumatic Tool Company decided to end its production of diamond drills . 5. Instead, he used a secondhand diamond drill rig and his geologic training for his prospecting. 6. Synthetic diamond drill bits allow for faster drilling because they are stronger, sharper and more durable. 7. A diamond drill borehole was once dug on this property near the mouth of the stream. 8. Danlou Mines Limited also completed three diamond drill holes totalling } } north of the Danlou Occurrence. 9. The companies said they have scheduled a diamond drill program to continue the evaluation of the property. 10. Some memorial companies use local etchers, who employ a hand-held diamond drill much like a dentist drill.
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