机床控制，控制y轴和x轴,达到最佳的控制效果-Machine control, control y-axis and x-axis, to achieve the best control effect

SD2.0协议，完成的SD2.0协议文档，3部分(The information contained herein is presented only as a standard specification for SD Card and SD Host/Ancillary products. No responsibility is assumed by SD Card Association for any damages, any infringements of patents or