抽头是屏蔽电缆泄漏最严重的部分。
The leakage of the pigtail section of a shielded cable is the most serious.
坦白地讲，如果我有一根ISDN线路，我会要求电缆中不带抽头和电桥。
And frankly, if I were getting an ISDN line, I'd ask for a line that had no taps and no Bridges.
坦白地讲，如果我有一根ISDN线路，我会要求电缆中不带抽头和电桥。
And frankly, if I were getting an ISDN line, I'd ask for a line that had no taps and no Bridges.
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