boron-free glass
... boron glass 硼玻璃 boron-free glass 无硼玻璃 borosilicate crown glass 硼硅酸盐冕玻璃 ...
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无硼无碱玻璃纤维 [材] boron-free and alkali-free glass fiber ; boron-free alkali-free glass fibre
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