ENERGY
Along with its work on some other projects , Sigra built up its own technologies , which was vital to the economic success of the company . In 1996 , the company developed its overcore stress measurement system ( IST ), which allowed for HQ coring at depths of 2000 m .
The company undertook further innovations , eventually working on field measurement projects . This led to the evolution of the tectonic strain theory that explained the varying stresses measured through sedimentary strata . Now , this process has been nearly universally
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