| 摘要 |
<p>A pumping unit for feeding oil under pressure to a user (3) is provided with a gas accumulator (11) having a piston (17), which is slidingly mounted in a cylinder (12), and within the cylinder (12) itself, defines a first chamber (19) containing a gas under pressure and a second chamber (20), which is hydraulically connected to the user (3), and houses a pump (24) therein, having a delivery outlet (29) hydraulically connected to the second chamber.</p> |
