| 摘要 |
The indicator has a casing which can be separated into two parts (1,2), having a mechanism composed of two gears (3) with discs (4) and pins (5). The discs have code figures such as letters and their rotation on a single axis allows the figures to be displayed in windows (6). The discs are blocked by catches (7) fitting in the notches. The catches can tilt on a single axis against return tension springs (8). The casing can have two lugs to prevent rotation around the guide bar. The springs can function under tensioned maintained by the catch against notches in the wheels to hold them in the stopped position.
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