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[買錶]夜光持久的美錶有那些!?

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sky005066
白金會員

註冊時間: Sep 03, 2009
文章: 2811

發表於: 星期四 2012-01-12 21:33

ball

dannysu0823
新進會員

註冊時間: Jan 03, 2012
文章: 13

發表於: 星期四 2012-01-12 21:54

BALL又一票..

ow
新進會員

註冊時間: Dec 22, 2005
文章: 4

發表於: 星期日 2012-01-15 23:14

Those light tubes contains radio active gas. That's why, they have T25 on dial 6H. That means tritium (T), half life 25 years. Everybody in watch industry get these light tube but they don't want to use as they need to think about how to handle radiation substance in after sales service