12.1 The repeating signal shall repeat the clear aspect of the main signal.12.2 When the repeating signal is displayed by combined lights,single light shall not be illuminated. (共 176 字) [阅读本文] >>
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 12.1 The repeating signal shall repeat the clear aspect of the main signal.12.2 When the repeating signal is displayed by combined lights,single light shall not be illuminated. (共 176 字) [阅读本文] >>
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