PD

1) Proportional-Differential-Regler

EN proportional plus derivative controller

2) Privatdozent

EN private lecturer

3) Pressedienst

EN press service

4) Potentialdifferenz

EN potential difference between electrodes; voltage between lines of a system

5) Postdampfer

EN mail steamer

6) Polizeidirektion

EN police headquarters

7) Patentdokumentation

EN patent documentation