| 摘要 |
<p>A two-speed cylinder of the invention comprises a cylinder tube having an open end and a closed end, with at least one cylinder port located in the tube. A bearing sleeve is movably mounted in the tube. The bearing sleeve comprises a body and a bearing sleeve head. The bearing sleeve body has at least one port. The cylinder also comprises a rod having a first end and a second end, with the second end of the rod configured to slidably engage the bearing sleeve when the bearing sleeve is inside the tube.</p> |
