在恶意攻击语句中，SQL注入和中间件通道复用两种攻击是难中难，同时也是重中重。
In the malicious attack statement, two kinds of attacks, SQL injection and middleware channel multiplexing, are hard and heavy.
其它开关卡，例如7700型20通道差分复用模块，采用的是闭锁型继电器，无论是成对还是单独使用一个闸刀，偏移电压都是相同的。
Other CARDS, such as the Model 7700 20-channel Differential Multiplexer Module, use latching relays, and the offset voltage is the same whether the poles are used as a single pole or as a pair.
以苏州电力光纤通信网西外环为对象，研究了各种通道故障下复用段保护切换、恢复过程中通道时延的变化情况。
Taking the Suzhou power fiber optic communication grid as the object of research, this paper studies the transmission delay during protection and recovery in various channel failures.
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