- A DISCUSSION ON THE MECHANISM OF PETROLEUM DIFFERENTIAL PUMPING FUNCTION--A CASE STUDY OF THE BIYANG DEPRESSION
- Design and Construction of a Molecular Beam Mass Spectrometer with Three Differential Pumping Stages
- Blood is pumping out of his belly like a fountain.
- Blood was pumping out of his belly like a fountain.
- Her heart was pumping very fast.
- He was pumping away the whole day.