| 摘要 |
PROBLEM TO BE SOLVED: To provide a comb formed in such a manner that the degree of its inclination may be adequately detected without bulking the structure over the entire part of the comb. SOLUTION: A cavity part 5 along the longitudinal direction of the comb 1 is formed in a transparent base part 3 of the comb 1 and a plurality of fluid, like air 7 and colored water 8, are sealed into the cavity part 5 in such a manner that a boundary surface 9 may be visually observed. The degree of the inclination of the comb 1 is detected according to the length of the boundary surface 9.
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