What equipment is described as a frame containing one or more mortars?

The equipment described as a frame containing one or more mortars is a mortar rack. In the context of fireworks display, a mortar rack serves as a structure designed to hold the mortar tubes securely in place during the launch of aerial shells. This ensures stability and proper alignment while allowing for a safe and efficient firing sequence, which is critical for both the safety of personnel and the success of the display. The design typically accommodates multiple mortar tubes, allowing for simultaneous launches of multiple shells, which enhances the visual spectacle of the fireworks show.