Starting right here, down to right about there, is the firing chamber for the gun.

从这里开始，一直到那里，是枪的发射室。

When you push this handle, it will allow air to flow through this  valve and into the main firing chamber where the air is regulated to 40 psi.

当您推动此手柄时，它将允许空气流过此阀门并进入主燃烧室，在那里空气被调节到 40 psi。