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What is a Negative Ion? (13)
What is Tourmaline? (7)
Tourmaline explorer (11)
Negative Ion FAQ (53)
Ideal amount of negative ions (1)
Actual negative and positive ion measurements featured in literature and media (1)
How to Choose the Best Negative Ion Generator (aka. Ionizer) (1)
How to Choose the Best Air Ion Counter (1)
How to Choose the Right Negative Ion Products (9)
Misunderstanding about negative ions (10)
Theory of Air Ion (1)
Measurement Theory of Air Ion (1)
Negative ion effects reported in medical literature (13)
Lenard effect (2)
Negative ion counter comparison chart (2)
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Universal Plan Co., Ltd.
107 Tachikawa-Lumiere, 3-5-1, Ichiban-cho, Tachikawa-city, Tokyo, 190-0033, Japan
Phone: +81-42-848-5311 Fax: +81-42-848-5148
Copyright (C) Universal Plan Co., Ltd. 1993-2024

Japanese Corporate Number: 1012802002452 (National Tax Agency Japan)