修复build42.12更新以来的若干问题。
Fixed several issues since the build42.12 update.

解决了M1013无法制作的bug
Solved the bug where M1013 cannot be made

新增三种兑换求生之路武器改件的方法
Three new ways to exchange for Firearm Parts for Left 4 Dead have been added

调整了全部武器的后坐力和射程，使得其强度符合b42现有的水平要求
Adjusted the recoil and range of all weapons to ensure their strength meets the current level requirements of the B42

因为未完工，暂时删除了近战武器音效
Due to unfinished work, the sound effects of melee weapons have been temporarily deleted

解决了杂志到处刷新在架子上的问题
Solved the problem of magazines spawning on shelves everywhere