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| Logicsphere Limited Offers software for designing and analysing concrete mix proportions. http://www.logicsphere.com/ |
| Rebar Software Development Offers rebar detailing shareware for the steel concrete reinforcement industry. http://www.rebar.net/ |
| Sigma Data Systems, Inc. Offers Visual AC/4, a system for scalehouse control, dispatching and delivery for sand, gravel, mulch, and bituminous concrete operations. http://www.vac4.com/ |