| Roberts & Schaefer Co. |
| Roberts & Schaefer Company (R&S) is a full-service organization of project managers, engineers, construction managers and support staff providing specialized services to an ever-expanding industrial marketplace. |
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| Breaker Technology, Inc. (BTI) |
| BTI manufactures and distributes of a wide range of mine, quarry, construction and demolition equipment. Specializing in hydraulic hammers, mobile rock breakers, stationary and portable rockbreaker systems, construction and demolition attachments. |
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