Bevro
Offers solutions for boring activities: providing horizontal controlled bore holes, compression bore holes, pneumatic piercing, ground and cable work.
http://www.boringsystems.com/eng/bevri.html

Toltec Incorporated
Supplier of finished bore sprockets and other power transmission components.
http://www.toltecincorporated.com

Single Bore Multiple Anchors Ltd.
Specialist ground anchor design and consultancy.
http://www.sbmasystems.com

Rotorchrome
Rotorchrome: refinishing, replating, repairing & hard chrome plating pump rotors to OEM specs for 50% of original cost.
http://www.rotorchrome.com

WestCoast Rotor Inc
US manufacturers of replacement parts for progressing cavity pumps.
http://www.westcoastrotor.com/

Underground Devices, Incorporated
Duct spacers, bore spacers and nonmetallic manhole cable racks for underground power and communications installation. Our address is 3304 Commercial Ave. - Northbrook, IL 60062. Our phone number is 847-205-9000.
http://www.udevices.com/

Choice Tool and Mold Inc.
Precision cavity molds for the automotive and medical products industries.
http://www.choicetool.com/

Cavnet
Cavity-nesting bird scientific discussion list. Established by Dr. Eric L. Walters in 1995 to foster scientific discourse regarding cavity-nesting birds worldwide.
http://www.dartmouth.edu/~cavnet/

Anthoceros crispulus
Light micrograph showing antheridial cavity with 8 endogenous antheridia attached to the base.
http://www.science.siu.edu/landplants/Anthocerophyta/images/Anthoc.%20crisp.anthcav.JPEG

Eastern Atlas
Specializing in investigation of contaminated sites, dykes, landfills, cavity and utility detection.
http://www.eastern-atlas.com/eng/service/ing_umwelt/top_ing_umweltgeophysik.htm