| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a form extremely simplifying exchange of a chisel. <P>SOLUTION: An operation member (70) can be moved by an operation unit (60), the operation member (70) having a drawing section (73). This drawing section (73) has a space from a pushing section (74), and disposed in a lateral direction with respect to a moving direction (V) of the operation member (70), so that the operation member (70) is force-operable by the operation unit (60) in both directions in the moving direction (V). <P>COPYRIGHT: (C)2009,JPO&INPIT |
