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| 21. | preserve from decay |
| 防止腐烂 |
|
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| 22. | secure from loss |
| 防止损失 |
|
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| | |
| 23. | accident prevention |
| 事故防止 |
|
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| | |
| 24. | prevention of fraud |
| 防止舞弊 |
|
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| | |
| 25. | control of lesion |
| 防止损害 |
|
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| | |
| 26. | antisyphonage pipe |
| 防止虹吸管 |
|
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| 27. | wear prevention |
| 防止磨损 |
|
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| | |
| 28. | prevention of cycling |
| 循环防止 |
|
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| | |
| 29. | offensive odor control |
| 臭气防止 |
|
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| | |
| 30. | prevention of silica dust |
| 防止矿尘 |
|
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