水准仪中,怎么用上、下丝在水准尺上读数,计算水准仪至水准尺的距离啊
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2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59 2025-02-04 01:57:59