3~30메가헤르츠(MHz) 사이의 무선 주파수 대역
A range of radio frequency electromagnetic waves between 3 and 30 megahertz, also known as decameter band or shortwave.
예문:
"The HF band is essential for long-distance aviation and maritime communication."
"Amateur radio operators often use HF frequencies to talk with people across the globe."
"Solar flares can cause significant interference in HF radio transmissions."
단어 'half'의 약어로, 주로 제본이나 메모에서 사용됨
A written abbreviation for the word 'half', frequently used in bookbinding descriptions or informal notes.
예문:
"The rare edition was described as having a hf leather binding with marbled boards."
"Check the hf title page for the author's original signature."