of Commerce, Trade and Industry, the Hon. Margaret Mwanakatwe, will head up a high-level government delegation at the upcoming... ??? Cotecna expands in South Africa with the integration of CoalLab Pty Ltd Cotecna, one of the world???s leading inspection, testing and certification companies, is pleased to announce the integration of CoalLab Pty Ltd, a leader in South Africa in the field of coal an