求翻译：本设计变焦控制的装置包括步进电机、电机驱动器以及控制平台，其控制程序用C语言编写，最终设计出电路，实现变焦镜头自动调焦的功能。是什么意思？

The design of the zoom control device includes a stepper motor, motor drive and control platform control program using the c language, the final design of the circuit, zoom auto-focus function.

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This design focal variation control installment including step-by-steps the electrical machinery, the electrical machinery driver as well as controls the platform, its control procedure with the C language compilation, finally designs the electric circuit, the realization zoom lens automatic focussi

The design of the Zoom control equipment including stepping motors, motor drives and control platform, the control program written in c language, ultimately design the circuit, implements a zoom lens, auto focus feature.