| 摘要 |
PURPOSE:To contrive to detect easily a screw position, while preventing the invasion of dust or pellet, etc. inside of a cover by arranging a scale with a transparent sheet on a part of the cover covering an injecting and measuring mechanism. CONSTITUTION:The transparent sheet 11 such as smoked acryl, etc. is provided at a part of a cover 3, thereby enabling the indicator 13 indicating the screw position fixed to a holding plate 7 through the transparent sheet 11 to be observed. Then, a scale 12 is caused to be easily read by using the point light source such as a photodiode for the indicator 13. |
