Topservices, 1982-83 Catalog--Hole Openers and Underreamers. |
Industrialexport 1974-75 Catalog--Rock Bit Underreamers. |
Baker 1974-75 Catalog--Lockomatic Expanding Hole Opener. |
Eureka 1962-63 Catalog-Swan Underreamers. |
Grant 1982-83 Catalog--Blade Wall Scraper, Rock Bit Underreamer, Hole Enlarger. |
Drilling & Service, 1982-83 Catalog--Diamond Underreamer. |
A-1 1982-83 Catalog--Expandable Underreamer. |
A-Z 1982-83 Catalog--Hard Rock Underreamer, Rock Bit Underreamer, Dual Rock Type Underreamer, Section Mill. |
Servco 1968-69 Catalog--Section Mill/Casing Cutter, Rock-Type Hole Opener, Rock Crilling-Hole Opener. |
Servco 1982-83 Catalog--Rock-Type Underreamer, Drilling-Type Underreamer, Two-Stage Underreamer. |
Tri-State 1982-83 Catalog--Lockomatic Expanding Hole Opener, Fixed Hole Opener, Section Mill. |
Lor 1982-83 Catalog--Rock-Type Underreamer, Drilling-Type Underreamer. |