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Three-stage cylinder actuators are 0-45-90 and 0-90-180 degrees. After air intake, the piston moves toward both ends and is mechanically limited by the auxiliary piston at both ends to achieve the middle position. Three-stage pneumatic actuators, such as 20 degrees, 30 degrees 50 degrees, 75 degrees and 95 degrees, 120 degrees, 130 degrees, 150 degrees and 175 degrees, can be used for quantitative loading. In the quantitative canning system, the controlled ball valves can be controlled separately.
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