Rasa Industries can help your company dig itself a hole. Rasa has three major business segments: machinery, chemicals, and electronic materials. Its machinery segment makes pipe-jacking machines used for tunneling in the installation of sewer, gas, and water lines and electricity and communication networks; it also makes screens and pumps for dealing with the slurry that its pipe-jacking machines produce. Rasa's chemical products include phosphorus, ferric oxide, and phosphoric acid. In 2011 Rasa's electronics division sold its silicon wafer recycling operations to RS Technologies. The unit continues to make high-purity materials such as gallium and phosphorus for electronics.