There it is X is 0, Y is 3. That's b.
X是0,y是3，那是b。
Conversion Method between Construction Coordinate (a, b) and Land Measuring Coordinate (X, Y).
施工坐标(A,B)与大地测量坐标(X,Y)之间的几种换算方法。
Conversion Method between Construction Coordinate (a, b) and Land Measuring Coordinate (X, Y).
施工坐标(A,B)与大地测量坐标(X,Y)之间的几种换算方法。
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