These are containers built to other than DOT specifications but are authorized by the DOT for use in the transport of approved products.

这些容器的制造不必遵守DOT规范，只是得到了DOT的用于运输已核准产品的授权。

youdao

If approved, the dot-extensions would be available for new URLs, joining familiar extensions .com and .org, and country extensions such as .uk.

CNN: Saudi Arabia objects to .gay and .islam domain names

When both the FAA and the DOT announced in late August that ValuJet was tentatively approved to resume operations, they agreed that the airline had taken those corrective measures.

CNN: ValuJet back in the air at last - Sept. 26, 1996