On the calculation of leakage and friction of reciprocating elastomeric seals / Arnoldus Franciscus Cornelis KantersThe leakage-free operation of radial lip seals / Pieter Gerardus Maria van BavelCE markering in internationaal verband : beleidsinstrumenten voor niet-lidstaten / F.R. Egter van WissekerkeMagnetic bearings : theory, design, and application to rotating machinery / Gerhard Schweitzer, Eric H. Maslen, editors ; contributors, Hannes Bleuler ... [et al.]Seals and sealing handbook / Robert FlitneyWerktuigonderdelen / S. Binnendijk