- BGRI Crystal Material Company Ltd.
- calcium fluoride (caf2) crystal, barium fluoride (baf2) crystal, magnesium fluoride (mgf2) crystal, lithium fluoride (lif) crystal, cerium flouride ceric fluoride (cef3) crystal, lead fluoride (pbf2) crystal.
- Address:No.1 DONG DA DI CHONG WEN MEN WAI, Peking, Peking, China
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