IEC 60950-1:2005/A2: 2013 Question 5
3.3.5 Table 3Ec The sum of the cross-sectionalareas of the screw and the nut shall not be less than three times thecross-sectional of the conductor size in Table 2D or Table 3B as applicable.这段话说的螺母与螺帽截面积之和不小于3倍的导体截面积，请问螺母与螺帽截面积之和是指什么？二者不是相同吗？
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