dense barium flint
重钡火石玻璃，含钡重火石玻璃

• photoheliography
• photohole
• photohyalography
• photoimpact
• photoinactivation
• photoinduced
• photoinduced strain
• photoinduction
• photointaglio
• photo-interpretation
• photointerpreter
• photo interrupter
• photoionization
• photoionization detector
• photoionization threshold
• photoisomer
• photoisomerisom
• photojunction cell
• photojunction diode
• photoklystron
• photolabile
• photolayer
• photolesn chromatism
• photoline
• photolithgraphic