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锅炉发生汽水共腾的处理?

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中国丹霞地貌的特点是什么?

JZXC-0.14型继电器的充磁值为()。

AC2.16A
B. AC2.6mA
C. AC400mA
D. AC5A

()is the most visible signal of distress from a lifeboat at sea in the daytime.

A. Smoke signal
B. Flash signal
C. Fire signal
D. Radio emergency transmissio

计划钢液量5000kg,加锰铁前,钢液含锰0.25%,加锰铁后,计算含锰量可到0.50%,但实际分析含锰量为0.45%,求实际钢水量?

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