Those 'constant' fields represent data only entered once and which should entered in a different, related record with a link to your list of parts removed.
EquipmentDisassembly::__pk_EquipID = PartsRemoved::_fk_EquipID
Make _pk_EquipID an autoentered serial number and define all your "constant" fields in EquipmentDisassembly.
To make data entry in the portal easier,, double click the relationship line between these two tables and select "Allow Creation of Records via this relationship" for PartsRemoved.
Put a portal to PartsRemoved on the EquipmentDisassembly and use it to record data on each part that is removed. This will be much like a sales invoice where you have one invoice record to document the customer, date sold, total sale, etc with a related table of line items to list each item purchased in that sales transaction.