Independent coordinate systems are used in some regions. The relationship of conversion between such independent coordinates and the BJS 54 coordinate system, widely used in China's engineering field, is generally confidential.

  • 有些地区使用独立坐标系,独立坐标系和我国工程界广泛使用的BJS-54坐标系之间的换算关系一般是保密的。

  • 互联网摘选 2025-01-20 13:06:32

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