Several of these companies might implement the full standard, although that is not assured.
尽管不是很确定，这些公司中有几个可能实现完整的标准。
UIC556 protocol is the standard to implement this kind of mutual operation.
UIC 556协议则是为实现这种互操作性制定的标准。
UIC556 protocol is the standard to implement this kind of mutual operation.
UIC 556协议则是为实现这种互操作性制定的标准。
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