Pneumatic Control Combinations .................................................................................................................................. 147
Pneumatic Centralization .................................................................................................................................. 152
Pneumatic Control System Example .................................................................................................................................. 153
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Averaging Relay ...................................................................................................... 143
Ratio Relay ............................................................................................................. 144
Pneumatic Potentiometer ........................................................................................ 144
Hesitation Relay ...................................................................................................... 145
Pneumatic Switch ................................................................................................... 146
General ................................................................................................................... 147
Sequence Control ................................................................................................... 148
Limit Control ............................................................................................................ 148
Manual Switch Control ............................................................................................ 149
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