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zb ¡£Ïò×ø±ê d 0 1.2 2.4 V 0 263 1331 Vz 0 315.6 3194.4 0 189 2295 zb 0.600 0.719 12000

zb=2.042+(7.8-7.2) 10000 8000

* (2.405-2.042)/1.2 6000

4000 =2.224 m

2000 0

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