About VOORTHUYZEN J A
About Univ. Twente, Enschede, NLD
About BERGVELD P
About Univ. Twente, Enschede, NLD
About SPRENKELS A J
About Twente Technology Transfer, Enshede, NLD
About IEEE Transactions on Electrical Insulation
About electret
About FEP
About Piezoelectric devices
About Audio equipment
About 音