易经八卦全图完整版简介：Through the semaphore, the entire huge troop transport ship can accept the command of the flagship in a unified manner. No matter whether it is moving forward or retreating, it will not be messed up.
Through the semaphore, the entire huge troop transport ship can accept the command of the flagship in a unified manner. No matter whether it is moving forward or retreating, it will not be messed up.
