Acoustics, Ultrasound and Vibration Ultrasound Piezomaterials ManufacturersAPC International, Ltd. Search Our Site Available Now! APC International Ltd. releases their new text book. Click here to find out how to order this book! Text book is now available in Russian. Contact Sergej Zhukov for details. Who Is APCI? | What Can APCI Do For You? | Other Sites of Interest APC International, Ltd. is a global manufacturer and supplier of high quality piezoelectric ceramics and piezoelectric products for customers in a wide range of industries: aerospace, automotive, consumer, engineering and design,