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n. high frequency（高頻）的簡寫

high frequency（高頻）的簡寫

WordNet (r) 3.0 (2006) (WordNet)

Hf
n 1: a grey tetravalent metallic element that resembles
zirconium chemically and is found in zirconium minerals;
used in filaments for its ready emission of electrons [synonym:
{hafnium}, {Hf}, {atomic number 72}]
2: 3 to 30 megahertz [synonym: {high frequency}, {HF}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Hydrofluoric \Hy`dro*flu*or"ic\, a. [Hydro-, 2 fluoric.]
(Chem.)
Pertaining to, or containing, hydrogen and fluorine;
fluohydric; as, hydrofluoric acid.
[1913 Webster]

{Hydrofluoric acid} (Chem.), a colorless, mobile, volatile
liquid, {HF}, very corrosive in its action, and having a
strong, pungent, suffocating odor. It is produced by the
action of sulphuric acid on fluorite, and is usually
collected as a solution in water. It attacks all
silicates, as glass or porcelain, is the agent employed in
etching glass, and is preserved only in vessels of
platinum, lead, caoutchouc, or gutta-percha.
[1913 Webster]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006) (vera)

Have Fun (slang, Usenet, IRC)

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Hf	查看　Hf　在Google字典中的解釋	Google英翻中〔查看〕
Hf	查看　Hf　在Yahoo字典中的解釋	Yahoo英翻中〔查看〕

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