1. Components or elements of a machine, device, or system that require specialized knowledge to understand, repair, or maintain
The mechanic replaced the technical parts of the engine.
O mecânico substituiu as peças técnicas do motor.
2. Specialized or complex sections of a document, text, or presentation that contain detailed information
The technical parts of the manual explain how to troubleshoot the device.
As peças técnicas do manual explicam como resolver problemas do dispositivo.