20个数字2中2有多少组简介：Jianlu's artillery fired first, but not all of them. Instead, they fired three shots first. This was a normal test shot. After the test shot was calibrated, they could all fire.
Jianlu's artillery fired first, but not all of them. Instead, they fired three shots first. This was a normal test shot. After the test shot was calibrated, they could all fire.
