Dear Mr. Yodying L.,
Thank you for your email. In the trap you copied in your email there is an OID .1.3.6.1.4.1.15397.2.1.133.7.2 which means System disk usage. The other trap you included in the .csv file 1.3.6.1.4.1.15397.2.1.133.1.2 describes CPU load. These OID's are described in attached Snmp guide under "E.36. System"
You can also download MIB's from PacketLogic GUI, please go to:
In PLClient > Tools > File Manager > SNMP
Please upload these files to MIB browser and search the OID's.
If you have any additional questions, please be specific what information in the trap you are missing.