Large requirements is prefab the circle is in charge of corridor
From;    Author:Stand originally
One, state of affairs of development of foreign canal corridor is in early ** century, france (**** year) , England (**** year) , Germany (**** year) wait to begin build underground to be in charge of corridor integratedly. To ** century the United States, Spain, Russia, Japan, Hungarian wait for a country to also begin build underground to be in charge of corridor integratedly. Although Japanese early begins to build underground to be in charge of corridor integratedly (after be like shake of earth of east of Shanhaiguan, to revive capital and the 8 heavy administrative divisions of build are collective channel) , but truly extensive build land...