Original PM 12 / Model 12 submachine guns featured separate manual safety and fire mode selector, both being made in the form of the cross-bolt buttons.
原件日下午12 / 12型冲锋枪功能的单独的手动安全和消防模式选择,无论是在形式的跨螺栓按钮了。
2
Grain color selector with photoelectricity technology, is used to detect and separate the bad works from the grain compound, based on the differences of color and shape.