| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems wherein it is difficult to continue an operation in which the line of sight is upward for a long time to require the suspension of the operation sometimes within a short time by lowering the head, and the same posture cannot be kept as wished. <P>SOLUTION: The fatigue of the neck is extremely reduced by supporting the occipital region upward to enable some constant operation to be carried out at the same posture. <P>COPYRIGHT: (C)2008,JPO&INPIT |
