This article deals with methodological support for the design of effective supersonic flat external compression input devices. A concise analysis of the contribution of well-known scientists in the study of braking processes of supersonic flows of the working body in the system of sealing jumps is presented in the input devices. The proposed method of rational formation of the braking... https://www.roneverhart.com/Polly-Pocket-Polly-Lila-Tropicool-Pineapple-Wearable-Purse-Compact/