BGO explains why water protection can quickly be done by failure



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  1. BEC explained about the expectation that water protection in a tunnel was high speed using a Zing.vn failure
  2. Staff hold failure to & # 39; underground tune & VnExpress a & # 39; protection of waterproof products &
  3. Failure to protect water protection products & # 39; under the underground tunnel Dan Viet
  4. Full account

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