Techniques and systems for analysis, diagnosis and debugging fabricated hardware designs at a Hardware Description Language level are described. The improvement involves establishing within the extraction zone a desolventizing region defined between an inlet port and an exit port for the heated vapors and progressively displacing the desolventizing region from adjacent one zone end to adjacent its opposite end, whereby only a fraction of the marc within said closed zone is contacted with the flow of heated gaseous vapors at any given time. The surface of the second element, which may for example be a substrate pad, is provided with asperities into which the first element deforms plastically under pressure to form the mechanical interlock. 6, a number of branches of from 0.