| 摘要 |
47130 CAN 5A The system 20 ensures the proper placement of bottles 10, 16 which deliver material to a system. The system 20 prevents male components from being mounted on incorrect female components. The male components can be tubes 12, 18, and the female components can be covers 22 which fit on the openings of bottles 10, 16. A first key 68 is formed on a first male component 12, 18 and a complementarily-shaped first keyway 71 is formed on a first female component 22. Additional male and female component pairs have similar key-keyway pairs. Each key 68 and each keyway 70 includes first and second projections 78, 80. The first projection 78 is located in a reference position, and the second projection 80 is located a predetermined distance from the reference position. This distance for each component pair is selected to identify the particular component pair.
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