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为隧道开通而发行纪念邮票,在日本有过四回,那就是关门海底公路隧道(1958年3月9日),北陆铁路隧道(1962年6月10日),关越公路隧道(1985年10月2日)、青函海底铁路隧道(1988年3月11日)通车的四套单枚的纪念邮票。这里是笔者收藏的四枚首日封。(一)关门隧道连接日本下关市与北九州市的、全长3461米的关门公路隧道,是贯穿关门海峡的四条隧道中唯一的公路隧道。早在1939年5月便着手施工,由于战争带来的灾祸及其造成的后遗症,致使它退至19年后才建成。因穿越海底的岩石层,故采用了矿山法施工,还应用了当时的最新技术顶部盾构(Roof shield),上部用钢拱架支护,整个隧道全断面分
Issued commemorative stamps for the opening of the tunnel. There were four rounds in Japan. It was to close the sea tunnel (March 9, 1958), the Hokuriku Railway Tunnel (June 10, 1962), the Kwanchu Highway Tunnel (1985 October 2), four single sets of commemorative stamps opened to the undersea Railway Tunnel (March 11, 1988). Here is the author’s collection of four first day cover. (A) Closed-door tunnels A 3461-meter-long closed-door highway tunnel connecting Shimonoseki and Kitakyushu in Japan is the only one of the four tunnels running through the Komon Channel. As early as May 1939, construction began. Due to the scourge caused by the war and its aftermath, it was put off until 19 years later. Due to the rock layer through the sea floor, it adopted the mining method of construction, but also the application of the latest technology at the top of the shield (Roof shield), the upper part of the steel arch support, the entire cross-section of the tunnel