From an eighth grade education I worked from being a driller's helper to a driller, worked in construction and real estate, and started an international drillin
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Jacob de Gheyn's 'Exercise of Armes' was an immense success when first published in 1607. It is a fascinating seventeenth-century military manual, designed to i
An Invaluable Reference for Members of the Drilling Industry, from Owner–Operators to Large Contractors, and Anyone Interested In Drilling Developed by one of