The present invention discloses anti-idiotypic antibodies and fragments thereof against inhibitory Factor VIII anti-bodies, said inhibitory antibodies having an affinity for the C2 domain of Factor VIII. The honeycomb structural body of the present invention is a pillar-shaped honeycomb structural body that is mainly composed of inorganic fibers and has a structure in that a large number of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween. This is called \u201cmultiple lines of defense\u201d spray system This invention also provides a method of reducing dust around a continuous miner by configuring a spray system, located at the top or sides of the cutter boom, thereby improving control of respirable dust. The press also includes a bottom plate having several small holes formed in it and fans for forcing air through those holes and onto the seam being pressed and cooled.