| 摘要 |
AN APPARATUS INCLUDES A MAIN PLATE (1), A LEVEL (2) CAPABLE OF CHECKING A LEVEL STATE OF A BOTTOM SURFACE (5) OF THE MAIN PLATE (1) IN A LOGITUDINAL DIRECTION, A FIXED MEASURE (3) PROVIDED FOR THE MAIN PLATE (1)ON AN END SIDE AND HAVING A FEED SECTION (6) PERPENDICULAR TO THE BOTTOM SURFACE (5) OF THE MAIN PLATE (1), AND A MOVING MEASURE (4) HELD IN THE FIXED MEASURE (3), THE FIXED MEASURE (3) HAS A TIP REFRENCE SURFACE (8) AND AN INNER REFERENCE SURFACE (9) FORMED AT THE TIP THEREOF, WHICH ARE PARALLEL TO THE BOTTOM SURFACE (5) OF THE MAIN PLATE (1), THE FIXED MEASURE (3) AND THE MOVING MEASURE (4) HAVE A SCALE (10) FOR INDICATING A DISTANCE BETWEEN THE BOTTOM SURFACE (5) OF THE MAIN PLATE (1) AND A TIP REFERENCE SURFACE (8), AND A SCALE (11) INDICATING A DISTANCE BETWEEN THE BOTTOM SURFACE (5) OF THE MAIN PLATE (1) AND AN INNER REFERENCE SURFACE (9).
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