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تردد منخفض جداً (Info)


التردد المنخفض جداً (يرمز له اختصاراً VLF) وفق الاتحاد الدولي للاتصالات هو تردد لموجات الراديو يتراوح بين 3 إلى 30 ألف هرتز، وذلك يوافق طول موجة من 100 إلى 10 كيلومتر، على الترتيب.

لهذه الموجة عرض نطاق محدود، ولذلك لا تستخدم لنقل الإشارات الصوتية، إنما فقط لنقل الإشارات المشفرة.

Source: wikipedia.org
Low Ground

Low Ground
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Low Ground

Low Ground
Public Domain
Mittelniederdeutsche Handschriften

Mittelniederdeutsche Handschriften
Public Domain
Carillons Of Belgium And Holland : Tower Music In The Low Countries

Carillons Of Belgium And Holland : Tower Music In The Low Countries
Public Domain
17th Century Painting From The Low Countries

17th Century Painting From The Low Countries
Public Domain
The Art Of The Low Countries; Studies

The Art Of The Low Countries; Studies
Public Domain
Alte Hoch- Und Niederdeutsche Volkslieder, Mit Abhandlung Und Anmerkungen

Alte Hoch- Und Niederdeutsche Volkslieder, Mit Abhandlung Und Anmerkungen
Public Domain
Alte Hoch- Und Niederdeutsche Volkslieder, Mit Abhandlung Und Anmerkungen

Alte Hoch- Und Niederdeutsche Volkslieder, Mit Abhandlung Und Anmerkungen
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Frequency

Frequency
Public Domain
Frequency-curves And Correlation

Frequency-curves And Correlation
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Low

Low
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Low

Low
Anthelmintic Activity Of Continuous Low Doses Of Fenbendazole Into The Rumen Of Sheep

Anthelmintic Activity Of Continuous Low Doses Of Fenbendazole Into The Rumen Of Sheep

 
Public Domain
Fossil Flora Of The Lower Coal Measures Of Missouri

Fossil Flora Of The Lower Coal Measures Of Missouri
Public Domain
The Archaeological Use And Distribution Of Mollusca In The Maya Lowlands

The Archaeological Use And Distribution Of Mollusca In The Maya Lowlands
Public Domain
Das Buch Sidrach. Nach Der Kopenhagener Mittelniederdeutschen Handschrift V. J. 1479

Das Buch Sidrach. Nach Der Kopenhagener Mittelniederdeutschen Handschrift V. J. 1479
Public Domain
Studies In Lowland Scots

Studies In Lowland Scots
  (4)
Low Seth Godin

Low Seth Godin

 
Public Domain
A Comparison Of The Kelvin Double Bridge And The Potentiometer Methods Of Measuring Low Resistances

A Comparison Of The Kelvin Double Bridge And The Potentiometer Methods Of Measuring Low Resistances
Public Domain
Five Minute Sermons For Low Masses On All Sundays Of The Year

Five Minute Sermons For Low Masses On All Sundays Of The Year
Public Domain
Five Minute Sermons For Low Masses On All Sundays Of The Year

Five Minute Sermons For Low Masses On All Sundays Of The Year
Unavailable
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Frequency - Trust And Rebels

Frequency - Trust And Rebels
Unavailable
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Oman Birds Fly Low

Oman Birds Fly Low
Public Domain
A Cordial For Low Spirits: Being A Collection Of Curious Tracts

A Cordial For Low Spirits: Being A Collection Of Curious Tracts
  (3)
Adverbs Of Place - Time And Frequency In English

Adverbs Of Place - Time And Frequency In English

 
  (1)
The publisher is the author
رواية رحّالٌ في بلادِ الأرض المنخفضة الجزء (1)

رواية رحّالٌ في بلادِ الأرض المنخفضة الجزء (1)
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The High And Low Of The Animal World

The High And Low Of The Animal World
Public Domain
The General Orders Of Field Marshal The Duke Of Wellington ... In Portugal, Spain, And France, From 1809-to 1814; And The Low Countries And France, 1815

The General Orders Of Field Marshal The Duke Of Wellington ... In Portugal, Spain, And France, From 1809-to 1814; And The Low Countries And France, 1815
Public Domain
A Cordial For Low Spirits: Being A Collection Of Curious Tracts

A Cordial For Low Spirits: Being A Collection Of Curious Tracts
Unavailable
Copyright reserved
Repetition In The Arabic Statement

Repetition In The Arabic Statement
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Delicious - Low-calorie Meals

Delicious - Low-calorie Meals
The publisher is the author
تثبيت التردد في المولدات

تثبيت التردد في المولدات
Public Domain
Claws Bur, Ein Niederdeutsches Fastnachtspiel;

Claws Bur, Ein Niederdeutsches Fastnachtspiel;
1253 The Book Of Mu’in Al-hakam About The Rulings Between The Two Opponents 2398

1253 The Book Of Mu’in Al-hakam About The Rulings Between The Two Opponents 2398

 
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Loud - Low - Whisper

Loud - Low - Whisper

Book Categories

Novels And Literary Stories Islamic Religion Human Development And Self-development History Islamic Fiqh Literature Interpretation Of The Koran Philosophy And Logic Islamic Faith The Culture Biographies, Translations And Life Of The Famous People Biography Of The Prophet Muhammad, May God Bless Him And Grant Him Peace Psychology Teaching English English Islamic Philosophy Arabic Literature Arabic Sciences Of The Noble Qur’an And The Sunnah Of The Prophet Political Science And Strategy History Acclamation The Holy Qur'an Engineering Poetry And Poets Education More of Book Categories

Authors of books

Mustafa Mahmoud The Words Of God Almighty Ibrahim AlFiqi Muhammad Bin Saleh AlUthaymeen Ibn Qayyim Al-Jawziyya Ahmed Khaled Tawfiq Fahad Amer AlAhmadi Muhammad Metwally AlShaarawi Ali Bin Jaber AlFifi Dale Carnegie Islam Gamal Sayed Qutb Muhammad AlGhazali Omar AlHourani Agatha Christie Muhammad Bin Ismail AlBukhari Abbas AlAkkad Abu Hamid AlGhazali Najib Mahfouz Fyodor Dostoevsky Jalal AlDin AlSuyuti Bin Taymiyyah Ismail Bin Omar Bin Katheer AlQurashi Aldamashqiu Ibrahim Al-Sukran Mustafa AlAdawi More of Authors of books