“…T.) for financially supporting the research to produce this chapter. 297 early 1990s, these companies started to develop high pressure equipment based on their own expertise, and a number of articles were published about these developments (Farr, 1990;Ishii, 1991;Deplace & Mertens, 1992;Hori et aI., 1992;Kanda et aI., 1992;Triiff & Bergman, 1992;Zimmerman & Bergman, 1993;Mertens, 1994;Westerlund, 1994). Today, suppliers focus primarily on further optimization of these techniques, and developments are less pathbreaking than they were 10 years ago.…”