| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in the conventional pressure water washing machine that it can be used only for washing building frames one by one. SOLUTION: A washing arm device which can wash 50 pieces of building frames together as a bundle and can be inserted deeply into a narrow space at the inner side of the building frames and eject water in a lateral direction is provided. COPYRIGHT: (C)2005,JPO&NCIPI
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