| 摘要 |
Two differing section cylinders, communicating, contain water. Internal pressure on the small cylinder piston is transmitted to the larger, both front and rear. The larger cylinder piston rests on four piston heads, in small cylinders, 1.5 cm diameter, each base connecting with another 4 cm diameter cylinder, covered by a crown of 1/3 spherical form. The cylinder is closed by a smaller cylinder and a piston, fixed to the large cylinder base. All small cylinders are guided by walls and positioned by a piston.
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