The list on the previous page showed a list of Assemblies. Assemblies are items allocated to a special category where each item can 'contain' other items. We selected the 'Carburetor' from the list and another window pops open showing the carburetor's part number and all the parts required to build it.

There's no limit to the number of items a parts list can contain. In fact, an assembly can contain other assemblies which in turn can contain other parts and other assemblies. There's no practical limit to the number of levels you can have and our lawn mower, although quite simple, shows a typical multi-level parts list on the following page.  
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