代码搜索：正反转控制
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www.eeworm.com/read/13308/273040
步进电机正反转
www.eeworm.com/read/15244/443297
矩阵键盘反转扫描
www.eeworm.com/read/15244/444676
步进电机正反转
www.eeworm.com/read/28786/872818
矩阵键盘反转扫描
www.eeworm.com/read/28786/874159
步进电机正反转
www.eeworm.com/read/28525/999908
矩阵键盘反转扫描
www.eeworm.com/read/28525/1001262
步进电机正反转
www.eeworm.com/read/283948/8977099
cpp 高斯投影正算.cpp
#include "iostream.h"
#include "math.h"
#include "stdio.h"
#define p 206264.806247 //一弧度对应的秒值
#define pi 3.1415926 //圆周率
#define a_ 298.3 //北京54椭球的扁率倒数
#define a 6378245.00000 //北京
www.eeworm.com/read/353861/10411464
doc 高斯正算公式.doc
www.eeworm.com/read/482834/6614055