How to use Transction Subtypes with source application as cMRO?

I find some seeded Source Transaction Types in Install Base which source application is cMRO.

How to use these Transction Types? Which action in cMRO will cause these kinds of transactions?

Select * from CSI_TXN_TYPES t where t.SOURCE_APPLICATION_ID=867

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Output of this sql:

UC_CREATE------------------------Unit Configuration - Create

UC_COMPLETE----------------------Unit Configuration - Complete

UC_UPDATE------------------------Unit Configuration - Update

UC_REMOVE------------------------Unit Configuration - Remove

CMRO_MAINTENANCE_WORK_ORDER------Complex Maintenance Work Order

ITEM_SERIAL_CHANGE---------------Item Serial Change