6个号复四中四多少组简介：Casting the projectile is not difficult. The key is to encapsulate it after loading the gunpowder, especially leaving a small hole plug for the fuse. How to ensure the sealing of the grenade is a severe test for the craftsmen.
Casting the projectile is not difficult. The key is to encapsulate it after loading the gunpowder, especially leaving a small hole plug for the fuse. How to ensure the sealing of the grenade is a severe test for the craftsmen.
