The Model 90 low pressure and Model 91 high pressure Selector Relays are designed to select the lower or higher of two signal pressures to provide a continuous output pressure to a control device.
示范90低压91高压模型选择继电器的设计选择较低或两个信号的压力较高，以提供持续的输出压力的控制装置。
Additive type with auto reset, automatically switched to 120 or 220 type synchronized with film type selector switch on film pressure plate.
增加剂型主动复位，主动切换到120或220型同步电影类型挑选开关电影压力板。
Additive type with auto reset, automatically switched to 120 or 220 type synchronized with film type selector switch on film pressure plate.
增加剂型主动复位，主动切换到120或220型同步电影类型挑选开关电影压力板。
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