A dual braided catheter shaft includes a flat wire forming the inner braid, thereby potentially allowing for reduced radial thickness of the shaft. The combined assembly includes a tubular body having recesses at opposite ends for receiving capped ends of the vial and the protosyringe, and a hub and needle assembly between penetrable sheaths or shields which acts on activation of the assembly to enable the transfer and conversion referred to above. The learning device has a measurement vector obtaining section for obtaining a measurement vector consisting of a measurement value of the control parameter and a measurement value of the criterion variable. The aerodynamic device can be attached directly to doors on the rear surface of a trailer or to a mounting frame that may rotate around to the side of the trailer where a roll-up style door is present. An outer circumferential portion of the copper member and an outer circumferential portion of the copper member are electrically connected with each other. The index includes index information and a trie, the index information includes an index item formed of a character string, the trie is formed of a plurality of nodes each including a part of the character string of the index item, and the index information and each of the plurality of nodes of the trie are associated with each other.