| 1. | In a double-acting engine there is only one piston per cylinder .
在双作用发动机中，每个汽缸里只有一个活塞。 |
| 2. | A chemical messenger is, at least, a "double agent". it attracts some species and repels others .
化学信使至少是一种“双作用体”。它引诱一些昆虫，忌避另一些昆虫。 |
| 3. | Modern stirling engine can be divided into two main categories-displacer type machines and double-acting machines .
现代的斯特林发动机可分成两大类：置换式发动机和双作用发动机。 |
| 4. | Double acting cylinders for agriculture . specifications
农用双作用油缸.技术条件 |
| 5. | Double acting high - pressure vane pump for ship
船用高压双作用叶片泵 |
| 6. | Double acting mid - pressure vane pump for ship
船用中压双作用叶片泵 |
| 7. | Two - stroke cycle double - acting
二冲程双作用的 |
| 8. | Two stroke double - acting type
二冲程双作用式 |
| 9. | Double acting positioner
双作用定位器 |
| 10. | Basic parameter and mounting connection dimension of double - acting cylinder for ships
船用双作用液压缸基本参数与安装连接尺寸 |
