欧美一区二区免费性爱视频播放器,无码精品人妻一区二区不卡,久久精品免费一久久久久久久久,亚洲中文久久精品无码97

Locomotive: In 1905, the Trans Siberian Railway was fully opened, and the trade route between China and Russia completely shifted from the Jin Mongolian region to the northeast. Russian merchants switched to railway transportation via Vladivostok, which was not only low-cost but also extremely convenient. The entire transportation time was only about one-fifth of the original land transportation time for horses and camels. This modification took a step forward in the development of productivity. To commemorate this meaningful event, the "locomotive" trademark design was derived from it.