HS code: 7002320000

Other unworked tubes of other glass having a linear coefficient of expansion not exceeding 5×1﹣6 per Kelvin within a temperature range of ℃ to 3℃

其他未加工的玻璃管(0-300℃时线膨胀系数小于5×10-6/开尔文的玻璃制);