The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早的弹比滑膛困难，但金属弹药筒的发明促进了后膛弹置的发展。

The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早的弹比滑膛困难，但金属弹药筒的发明促进了后膛弹置的发展。

The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早的前装步枪装弹比滑膛枪困难，但金属弹药筒的发明后膛装弹装置的发展。

The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早的前步枪比滑膛枪困难，但金属药筒的发明促进了后膛置的发展。

The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早的前装步装弹比困难，但金属弹药筒的发促进了后装弹装置的发展。

The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早步弹比滑膛困难，但金属弹药筒发明促进了后膛弹置发展。

The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早前装枪装弹比滑膛枪困难，但金属弹药明促进了后膛装弹装置展。

The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早步弹比滑膛困难，但金属弹药筒发明促进了后膛弹置发展。

The earliest muzzle-loading rifles were more difficult to load than smoothbore muskets, but the invention of metallic cartridges made possible the development of breech-loading mechanisms.

最早的前装步装弹比滑膛，但金属弹药筒的发明促进了后膛装弹装置的发展。