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What are the type A & B hollow instruments

Hollow Load Type A An object whose ratio of length of cavity to diameter is greater than 5. Hollow Load Type B An object whose ratio of length of cavity to diameter is greater than 1 and less than 5. Non Hollow Instruments (Solid Instruments) An object whose ratio of length of cavity to diameter is less than 1. Due acknowledgement is given to EN 13060:2004.