tungsten titanium plastic steel (1)
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The difference between TR90 and tungsten titanium plastic steel glasses frames

Features of TR90 Frames TR90, also known as plastic titanium, is a kind of transparent nylon polymer material with memory produced by a Swiss company. It is called nylon 12 or PA12 in the chemical industry and material industry. It is a thermoplasti...

jianbin guo · 16 September 2022 · 39
The difference between TR90 and tungsten titanium plastic steel glasses frames