Processes for producing fine LiFePO4C and nanostructured LiFexM1\u2212xPO4C composite powders, where 1\u2266x\u22660. A controller module is provided with at least one processor module, at least one storage resource, and at least one transfer control module connected to the processor module and the storage resource. The actuator cylinder and the compensation cylinder are linked by the inside of a conduit, and when the working arm is pivoted, the displacement of the piston of the actuator cylinder urges the piston of the compensation cylinder, a torque which balances the load torque of a load W on the working arm is generated. Each of the positioning units includes a pair of spaced apart positioning plates that extend upwardly from the base wall, and a pair of protrusions formed respectively at the positioning plates and adapted to abut against an internal wall surface of a tool head when the latter is sleeved on the positioning unit via a corresponding one of the positioning holes. The alert logic notifies the Exchange’s staff when the evaluation logic identifies a potentially erroneous trade that lies outside the theoretical no-bust range of prices.