线上星计划简介：The flintlock gun has a complex structure. A small trigger is divided into a series of small parts such as trigger spring, pull rod, sear, sear spring, hammer, and hammer spring. Any part made improperly may lead to failure of firing.
The flintlock gun has a complex structure. A small trigger is divided into a series of small parts such as trigger spring, pull rod, sear, sear spring, hammer, and hammer spring. Any part made improperly may lead to failure of firing.
