Based on launch system,electropult currency property technology is analysed simply,which is one of the key technology of aerial defence missile sharing-rack launch.
The agriculturist, Wang Chen-ho creations of wood for insertion of success, he also invented the punner racks, with a simple machine, increasing the efficiency of the typesetting.
This paper introduces the method of simple conversion measuring and calculation for gear rack thickness with depthometer as prime measuring tool and Measuring Pin,measuring ball as auxiliary tool.
An intelligent clothes rack is developed with a block installed on the end of each knighthead,around which steel wire is enwind and connected to a DC motor and the clothes rail.