30.2.2 中描述parts of insulating material within a distance of 3 mm of such connections, are subjected to the glow-wire test,
后面有描述This test is not applicable to--parts within 3 mm of any of these connections;
特請(qǐng)教列位高手,兩種描述有啥差別,或是本人才疏學(xué)淺,理解錯(cuò)誤??先行謝過!
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