| http://www.w3.org/ns/prov#value | - Further, there has been attempted a technique of contacting adjacent laminar flows of fluid in a fine channel by supplying a plurality kinds of fluid in mutually opposite directions or by crossing them at an arbitrary angle (see, for example, the publication entitled: ???Development in the formation of three-dimensionally crossing multilayer streams???, p. 55, preliminary papers for lecture by Aki
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