| 摘要 |
PROBLEM TO BE SOLVED: To provide a reliable power tool to prevent leakage of lubricant. SOLUTION: A volume variable air chamber 33 ventilated only to a housing outer part 27 is arranged in a housing inner part 26, and a connecting part of an outer shell part such as a housing 28 is sealed by a sealing material in order to prevent leakage of air and the lubricant. COPYRIGHT: (C)2005,JPO&NCIPI
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