| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce manufacturing cost by simplifying a manufacturing process. <P>SOLUTION: The arm member includes: a cylindrical casing 320 formed by casting; a first connecting pin insert hole 321 and a second connecting pin insert hole 322 formed in the casing 320; and a hollow portion 330 formed in the casing 320 to allow the first connecting pin insert hole 321 and the second connecting pin insert hole 322 to communicate with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
