A common application of the multistage centrifugal pump is the boiler feedwater pump. Sample households are selected by a multistage stratified statistical sampling scheme. Cluster sampling is commonly implemented as multistage sampling. Multiple types of multistage interconnection networks exist. The product is obtained after multistage purification and separation by extractive and azeotropic distillation. NACA had done a lot of research on multistage transonic compressors during the 50s. I multistage intercontinental ballistic missile (ICBM). This complicates the design of multistage amplifiers when compared with electronic devices. Under these circumstances, multistage cluster sampling becomes useful. OTRAG was a design quite different from conventional multistage rockets. The switching is implemented as a multistage (to achieve high gain) MOSFET amplifier. Rocket modelers often experiment with rocket sizes, shapes, payloads, multistage rockets, and recovery methods. A multistage rocket is required to reach orbital speed. There are two main types or setups of a coilgun&colon; single-stage and multistage. Two multistage "cyclone" air filters were used to improve dust removal.