General instrument > Á¦Ç°º° ºÐ·ù > Watch Glass > Á¦Ç°»ó¼¼Á¤º¸
¼®¿µ ½Ã°èÁ¢½Ã / Quartz Watch-glass   
� Made in PRC
� Thermal Expansion Coefficient 5.5 10-7 k-1
�High Transparent Quartz has Excellent Transmission, Especially Ultrared Zone and Vislble Area, Compare with Ordinary Glass
� max 1250¡Éin use, without Graduation, Softening Point 1680¡É
 
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