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01. |
Poor Value Perception |
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02. |
Poor Safety Awareness |
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03. |
Ignorance |
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04. |
Insufficient Knowledge |
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05. |
Insufficient Analysis or Research |
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06. |
Insufficient Prior Research |
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07. |
Planning and Design |
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08. |
Poor Planning |
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09. |
Usage |
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10. |
Operation/Use |
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11. |
Bad Event |
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12. |
Chemical Phenomenon |
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![](../dfen/DD1000080.jpg)
Impossibility to cast concrete by use of high-performance AE ( Air Entrained ) water reducing agent under the freezing point.
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