Introduction to the bridge deck: Due to the height of the terrain on both sides of the strait, the stone grades in the east and west vary. There are 46 stone grades in the east and 43 grades in the west.
Introduction to the bridge deck: Due to the height of the terrain on both sides of the strait, the stone grades in the east and west vary. There are 46 stone grades in the east and 43 grades in the west.