In the past, the manufacturing technology of ultra-high-pressure steel pipes over 10 meters in length was monopolized by foreign countries. However, times have changed after a Chinese company broke ...
元上都遗址位于内蒙古自治区锡林郭勒盟正蓝旗境内，2012年被列入世界遗产名录。此次进行考古发掘的元上都大龙光华严寺遗址位于元上都皇城东北角，平面呈长方形，整体为三重院落式布局。整个建筑群东、中、西三跨院相连，中院为主体。本年度主要发掘的区域为中院“工 ...
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