Development of a Retractable Linear Multifunctional Multimeter

Analyze the problems existing in the existing multimeter. The wire of the multimeter is severely damaged. The lifespan of the wire is closely related to its storage and storage. The article proposes improvement plans to solve the problem of storing multimeter wires. Develop a retractable linear multifunctional multimeter. Solve problems such as messy and tangled surface lines. Simultaneously improving the service life of the wire.