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"BPSG." (n.d.). Fullformexpand.com. Retrieved February 25, 2026, from https://www.fullformexpand.com/bpsg/boron-phosphorus-silicate-glass.
BPSG. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/bpsg/boron-phosphorus-silicate-glass (Accessed: 25 February 2026).