TO ENGINEERING CO.,LTD. was established in 1864, since then developed slow speed high out put engines as a pioneer of Diesel engine manufacturers and also has built engines of several types as a Licensee of Sulzer, Switzerland for the A25/30 engines.<br/>In 1959 ITO has started the manufacture of rotary blowers on the bases of techniques accumulated and experienced, since then ITO has made continuous effort for developing efficiency to meet users demand according to the technical progress. <br/>A special feature of the blowers is to provide with discharge port composed of slits which results in smaller pressure pulsation, very low noise and small vibration, thus IRS(T) (Low noise type)blowers and vacuum pumps have achieved good reputations of the users of versatile fields.