4期倍投反复投赢的概率

简介：Qin Fen couldn't help but look at the strengthening system. The highest strengthening level was level nine. In other words, he could strengthen each firearm to level nine. However, the higher the strengthening level, the more points and materials it would cost. The higher it is, the stronger it is with different materials, the stronger the firearm will be in different directions.