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Trepanation (also known as trepanning, trephination, trephining or burr hole) is a form of surgery in which a hole is drilled or scraped into the skull, thus exposing the dura mater in order to treat health problems related to intracranial diseases, though in the modern era it is used only to treat epidural and subdural hematomas, and for surgical access for certain other neurosurgical procedures (e.g. intracranial pressure monitoring).
Trepanation has been carried out for both medical reasons and mystical practices for a long time: Evidence of trepanation has been found in prehistoric human remains from Neolithic times onwards, per cave paintings indicating that people believed the practice would cure epileptic seizures, migraines, and mental disorders. Furthermore, Hippocrates gave specific directions on the procedure from its evolution through the Greek age.
Trepanation in pre-Columbian Mesoamerica
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Bohren, Drehen und Fräsen :: Auftragsfertigung
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F Tool Company - Specializes in small hole gundrilling.
Meta Description: [ BC&F Tool Company. Specializing in gundrilling. ]
Gundrilling - Specializes in hole drilling solutions with hole diameters from .078 inch to 2.75 inch and lifting capacities from 2 oz. to 20,000 lbs.
Meta Description: [ shallow hole gundrilling, deep hold gundrilling, Mold Plates, gun boring, gun reaming, Welcome to AM Gundrilling, serving the US for all your Gundrilling, machining, and boring needs. ]
Machining - Job shop specializing in drilling deep holes for industrial markets, primarily in the southeastern USA. Applications include cooling and heating water lines, heater cartridges, lubricated shafts, and hydraulic and air actuators.
Meta Description: [ Our mission is to provide our customers with cost-effective drilling to help them better serve their own customers. Each of our key people has a lifetime of machining experience. Our staff includes tool and die builders, mold makers, and general machinists. Our backgrounds include space and missi... ]
American Hollow Boring Co - Specialists in deep hole boring since 1918.
Apperley Honing Ltd - Independent specialist contract honing company in the UK.
Dadson - Precision gundrilling machines and contract gundrilling services. Also, BTA and ejector drilling, deep hole boring machines, high pressure coolant systems.
Meta Description: [ This web site has been created technology from Avanquest Publishing USA, Inc. ]
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Davis Machine and Tool - Custom gundrilling and deep hole drilling. Gundrills range from 3/16 of an inch to 2 inches in diameter. Services available for various types of materials.
Meta Description: [ Gundrills range from 3/16 of an inch to 2 inches in diameter. Gundrilling services available for various types of materials. ]
Dearborn Inc. - Gundrilling company with extensive range of capabilities serving variety of industries. Includes trepanning, honing, and pattern and concentric tube drilling. Site incorporates examples of complex and unusally shaped end products.
Meta Description: [ Dearborn, Inc. Internal machining specialists, provides gundrilling, deephole drilling, honing, trepanning, cnc-milling, cnc-turning, prototype machining, finished machine parts & concentric tubing. Since 1947. ]
Dearborn Precision Tubular - Deep hole machining services include gundrilling, trepanning, boring, honing, threading, milling, turning and straightening, for the aerospace, oilfield, medical, nuclear, power generation and capital equipment industries.
Deep Hole Specialists - Deep hole drilling, gundrilling, trepanning, honing for the metalworking industry.
Meta Description: [ Deep Hole Specialists is your one stop deep hole drilling source for gundrilling, trepanning, spade drilling, honing and turning. ]
Gundrilling Solutions - Specializes in providing advice and help with gundrilling problems and applications. Site explains capabilities and incorporates detailed account of process, configurations, applications, troubleshooting tips, and tool wear guide.
Honematic Machine Corporation - A complete source for precision hollow components. Services include deep hole drilling, honing, OD/ID grinding and CNC turning and milling.
Meta Description: [ The source for precision hollow components Honematic is continuously developing honing drilling & deep hole boring technology. Services: Drilling Grinding Milling Honing Boring & Turning ]
K. Simke Gundrilling - Canada. Specializes in gundrilling work, with particular emphasis on advantages of process for the moldmaking industry. Experience includes space, missile, machinery building, and oil drilling tool jobs.
Magna Standard Manufacturing - Specializing in gundrilling from 0.049 to 1.375 diameter.
Meta Description: [ Learn about the UNIX hosting plans for all machines and more domain hosting options. ]
Mollart Deep Hole Drilling Systems - Contract deep hole drilling services. Holes from 0.8mm to 300mm diameter and up to 4000mm deep. Deep hole drilling machines and tools for gundrilling, BTA and ejector technologies.
Meta Description: [ Gundrilling, deep hole drilling machines and tooling systems. Sole UK licence to manufacture and supply Botek Gundrill Tooling. The UK's largest specialist Deep Hole Drilling sub-contractor. ]
Nelson Precision Drilling - Precision deep hole drilling and honing services
Meta Description: [ Nelson Precision Drilling Co., Inc. gundrills stainless steel and alloys including hi-temp NI with accuracy and consistent quality to meet your specifications exactly. ]
Trepanning Specialties Inc. - Custom wall tubing, rings, and machined parts using trepanning, gundrilling, boring and honing.
