阶梯倍投方案1,2,24,4

简介：Bird blunderbuss fired in a straight line, while the Ming army had a strict formation, with a long shield as tall as a man erected in front of the formation. Most of the lead bullets used in the Han army's bird blunderbuss were fired on the long shield, and sawdust flew everywhere, making it almost difficult to Caused casualties to the Ming army.