题目内容
(请给出正确答案)
[多选题]
ZXCTN系列设备支持的隧道保护类型有?()
A.1:1
B.1+1
C.ndouble-emission and double-receiving
D.nsingle-emission and double-receiving
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A.1:1
B.1+1
C.ndouble-emission and double-receiving
D.nsingle-emission and double-receiving