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botsa is the general term for a class of mechanical parts used to fasten two or more parts (or components) into a single unit. It is a type of mechanical part used for fastening connections and is extremely widely applied. Various types of botsa can be seen on all kinds of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters, and supplies. Its characteristics include a wide variety of types and specifications, diverse performance and applications, and a very high degree of standardization, serialization, and generalization. Therefore, some people refer to those that already have national standards as one