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问题描述：

[单选] DH150A汇流条焊接机的冷却时间是 DH150B汇流条焊接机的冷却时间是
A．DH150F 汇流条焊接机的冷却时间是 ( ) B．1800~3000ms 1800~3000ms 1000~2500ms C．1000~2500ms 1800~3000ms 1000~2500ms D．1000~2500ms 1000~2500ms 1800~3000ms
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