| 摘要 |
Condition controlling apparatus for adjusting the setpoint of and indicating the actual value for a condition, is provided with a movable scale on the front face of a movable disc, a setpoint mark and a stationary scale, identical to the movable scale but in which the direction of increasing values is reversed, disposed on the front face of a stationary front plate having a window therein for viewing the pointer of a galvanometer and revealing only a limited angular zone on the movable scale.
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