AH has many meanings: first, as an interjection, expressing pain, pleasure, regret, surprise, etc.; second, it is an English abbreviation, indicating application hosting, authentication head, hyperopia astigmatism, etc.; third, It is the Latin abbreviation of the Jewish Era and the Islamic Era; four is the name of a Korean song. Interjections express pain, pleasure, regret, surprise, etc., equivalent to ah, ouch. Translated into Chinese: Ah! English abbreviation A. h = ampere-hour, a unit for measuring the capacity of electrical storage equipment, which can be simply understood as: 1A. h means that the electrical storage equipment can continue to work for 1 hour when the power supply current intensity is 1A. AH = Application Hosting, application hosting, multimedia terminology, the business name of an application service provider (ASP) that provides Internet application services to enterprise users. AH = Authenticaton Header, authentication header, is an important data encapsulation method of IPSec. It provides data integrity, data source authentication and anti-replay attack services for IP packets, but it does not provide data confidentiality protection. Ah = hyperopic astigmatism, hyperopic astigmatism. AH = abbreviation for auction house, meaning auction house. AH=Adolf Hitler Adolf Hitler, Hitler was the chairman of the German National Socialist Workers' Party and the head of the Third Reich. Committed suicide in Berlin in 1945. AH=Ass Hole is a curse word for "bastard" . Because the word Ass cannot be typed online, AH is often used instead~~~Latin abbreviation A.H. = anno Hebraico (=in the Hebrew year), Jewish Era. A.H. = anno Hegirae (=in the year of the Hegira), Islamic Era. World of Warcraft AH = the Chinese pinyin abbreviation of the copy of Wailing Cave AH = the English abbreviation of the auction house and the model prefix of the armed helicopter. aH = ampere hour 1aH = 1000 milliampere hour It is the product of current and discharge time Network protocol The AH protocol is used to ensure the integrity and authenticity of data packets and prevent hacker phase data packets or insert forged data packets into the network. Considering computational efficiency, AH does not use digital signatures but uses a secure hash algorithm to protect data packets. AH does not encrypt user data. The AH protocol is the best choice when authentication is required but confidentiality is not required.

AH in power engineering drawings usually refers to high-voltage cabinets.