prov:value
| - The acoustic matching layer may be formed of resins such as silicone resin, epoxy resin, urethane resin, polyimide, PEEK, polyethylene, fluororesin, etc.; a mixture comprising any one of those resins and particles of ceramics such as alumina, zirconium, etc., or a mixture of resins and particles of a metal or a glass; ceramics; glass; crystalline glass; or silicon.
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