煞車油為什麼會有DOT分級,愈高就會愈好用嗎
Get started with IMAP and POP3 - Gmail Help目前全世界的煞車油規範就只有分為3種規格,就是由美國運輸部(Department of Transportation)所制定的標準,也就是大家所熟知的DOT分級制度。雖然美國汽車協會SAE J1703、歐洲ISO 4925及日本 JIS 的 K-2233 都另外擁有各自的分級制度,不過因為SAE、IPOP and IMAP is what allows you to download messages from Gmail's servers onto your computer so you can access your mail with a program like Microsoft Outlook or Thunderbird, even when you aren't connected to the Internet....
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