V type packing structure has been employed to effectively transform the pushing force of the gland flange and the medium pressure into the sealing force against the stem.
阀杆采用V型填料密封结构，V型填料能将填料压盖的压紧力及介质力有效地转化成阀杆的密封力。
3
These four genes then produced transcription factors turning on and off other genes, and pushing the cell to "dedifferentiate" into stem cells.