Rigibore Tooling Systems
Content Management System
http://www.rigibore.com/

The Robbins Company
Supplier of new and rebuilt tunnel boring machines , small boring units , conveyor systems, back-up systems, cutters, spare parts and the over-all technology of tunneling.
http://robbinstbm.com

Johne & Co
Welcome to Johne & Co. We are spezialized for drilled shank taper tools, special tools and CNC working inklusive a wide range of boring units and bars.
http://www.johne-co.de/english/

American Hollow Boring Co
Specialists in deep hole boring since 1918.
http://www.ahb-erie.com/

SA Directional Boring
Australian (Payneham South, SA) Company that provides trenchless, underground boring services.
http://www.sadirectional.com.au/

Kellett's Well Boring, Inc.
Kellett's Well Boring is in the forefront of methane pollution control, exploration, gas recovery, and pipe line construction
http://www.kellettswell.com

Pacific Boring Home
A Caruthers, California based contractor specializing in Horizontal Boring and Pipe Jacking.
http://www.pacificboring.com/

International System of Units
Definitions of SI units and SI prefixes, units outside the SI, rules and style conventions, historical context for SI units, international aspects of the SI, and unit conversions.
http://physics.nist.gov/cuu/Units/index.html

Grum-Schwensen
Denmark. Multispindle vertical and horizontal boring machines for furniture manufacturing; special boring machines according to customers' needs.
http://www.grum.dk/

New England Boring Contractors
New England Boring Contractors has been meeting the most demanding test boring requirements since 1977.
http://www.newenglandboring.com/