CALMAT <CZM> SUES INDUSTRIAL EQUITY CalMat Co said it filed suit in Los Angeles Superior Court against Industrial Equity (Pacific) Ltd, against certain of its affiliates and against Ronald Langley, president of Industrial Equity's North American operations. The company said its sut charges that Langley missapropriated material non-public information acquired in his capacity as a CalMat director and used the information for the benefit of Industrial Equity. According to its more recent amendment to its Schedule 13D, Industrial Equity owned about 19.17 pct of CalMat's stock at October 14, CalMat said. It said Industrial has also stated that it intends to pursue a possible business combination in the near future.