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Multi position parallel reactor is an upgraded and integrated product of the basic model, which greatly saves laboratory space resources. This reactor is mainly used in laboratory parallel test, constant variable comparative analysis test, etc. Because of the experimental conditions, parallel reactors can be divided into two modes: simultaneous temperature control and independent temperature control. In addition, the volume, mixing form, work number, structural form, control mode, function configuration, etc. of the reactor can be combined freely according to the actual needs.