| 摘要 |
First and second cylinders each have a first and a second end with a precision recess formed in the first end of the first and second cylinders. A bore is in each of the first and second cylinders extending from the corresponding precision recess to the corresponding second end. A bearing faces the second end of the first and second cylinders. A precision plate is located in and having a thickness exceeding the combined depths of the precision recesses in the first and second cylinders so as to precisely locate the bores in the first and second cylinders with respect to each other. A first piston is located in and axially coextensive with the bore in the second cylinder. |
