BERLIN — Germany's Robert Bosch GmbH announced a 30M euro ($46.8M) investment in new projects in Poland, according to local reports. Most of the pledged investment is planned for the company's joint-venture with Japan's Denso to manufacture diesel particulate filters near Wroclaw. Bosch also plans to invest in a 130-person IT center and office building in Warsaw. Bosch Poland employs 1800 and last year invested 21M euros ($32.7M) in the country. In 2007, Bosch Poland reported 776M euros ($1.2B) in revenues, up about 10 percent year-on-year.