7020 Articles of glass, n.e.s.

7020 (01/1988-..) Articles of glass, n.e.s. 70200005 (01/1998-..) Quartz reactor tubes and holders designed for insertion into diffusion and oxidation furnaces for production of semiconductor materials 70200007 (01/2007-..) Unfinished glass inners, for vacuum flasks or for other vacuum vessels, unfinished 70200008 (01/2007-..) Finished glass inners, for vacuum flasks or for other vacuum vessels, finished 70200010 (01/1988-..) Glassware of fused quartz or other fused silica, n.e.s. 70200030 (01/1988-..) Articles of glass having a linear coefficient of expansion <= 5 x 10 -6 per kelvin within a temperature range of 0°C to 300°C, n.e.s. (excl. glassware of fused quartz or other fused silica) 70200080 (01/1998-..) Articles of glass, n.e.s. 70200090 (01/1988-12/1997) Articles of glass, n.e.s. (excl. articles of glass having a linear coefficient of expansion <= 5 x 10 -6 per kelvin within a temperature range of 0°C to 300°C or glassware of fused quartz or other fused silica)