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plateglass > bk7 ?
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09-02-2005, 10:02 AM
ballaratdragons
(Ken)
The 'DRAGON MAN'
Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
No, it's all to do with teperature equalisation.
The more expensive the glass, the less it shrinks and expands and the speed it does it.
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