Remember, Department of Transportation (DOT) regulations require that outlet seals be installed on many products.

记住，交通部规范要求在许多产品上安装排气口密封。

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Proper quality control of materials and inspections, as required by the Department of Transportation (DOT), lessen the probability of cylinder leaks.

正如交通部所要求的那样，材料的正确质量控制和检查降低了钢瓶泄漏的概率。

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The U. S. Department of Transportation (DOT) announced an 18-month campaign to improve road safety across the country.

美国交通部公布了一项历时18个月，旨在改善全美道路安全的活动。

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The U. S. Department of Transportation (DOT) announced an 18-month campaign to improve road safety across the country.

美国交通部公布了一项历时18个月，旨在改善全美道路安全的活动。

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