| http://www.w3.org/ns/prov#value | - The number of the concave passage 4 is optional, but in this example two concave flow paths 4, 4 are communicated with two paths 5, 5 whichare united into one passage 15 at an opening 5a of the disc type flange 3.The hot tip bushing Bo is made of a heat insulating metal, e.g. a stainless steel or the like.
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