 |
| |||
лабиринтно-винтовой насос (The main part of a labyrinth screw pump and seal is composed of both threads on the axle and the sleeve, which intersect at an oblique angle.  harvard.edu AK67) | |||
|
| |||
| лабиринтно-винтовой насос (The main part of a labyrinth screw pump and seal is composed of both threads on the axle and the sleeve, which intersect at an oblique angle. harvard.edu AK67) | |||