Table Design

I have a table for Equipment in a plant that contains all information about
the machine in general such as Production Number, Serial Number, Date
Purchased ect. Each machine has several sections that make up the whole such
as Feed section, Print Section and Cut Section. I want to have the main
machine with a number such as 123.000 and each part to list under that
machine such as (Feed) will be 123.001 and so forth. Each parent machine
already has an Equipment ID number that is an auto-number (existing DB) so
that ID 1 will be machine 123, 2 will be another machine. Is there a way to
"nest" the child machine under the parent without creating a table for each
section and each machine?

Whole Machine 123
Feed 123.001
Print 123.002
Cut 123.003


Thanks in advance for your help.

Richard