| 摘要 |
PROBLEM TO BE SOLVED: To provide an actuator without deteriorating a sealing property and a sliding property. SOLUTION: This actuator 1 comprises a main body 3 telescopically constituted in its longitudinal direction, and an actuating shaft 7 mounted on a longitudinal end face 5 of the main body 3, and seals water 11 expanded by freezing inside the main body 3. COPYRIGHT: (C)2005,JPO&NCIPI
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