Ultrafil
《英文msh詞典》Ultrafil
[入口詞] Ultrafil
[主題詞] Gutta-Percha
[英文釋義] Coagulated exudate isolated from several species of the tropical tree Palaquium (Sapotaceae). It is the trans-isomer of natural rubber and is used as a filling and impression material in dentistry and orthopedics and as an insulator in electronics. It has also been used as a rubber substitute.