… hard, granular igneous rock formed by the agglomeration of quartz crystals with feldspar and mica. It varies in colour … Sandstone is a rock of sedimentary origin composed of small quartzose or siliceous particles naturally agglomerated by …
… whether or not graduated or calibrated. 7017.10 - Of fused quartz or other fused silica 7017.20 - Of other glass having … glassware is frequently of borosilicate glass, fused quartz or other fused silica because of the greater chemical …
… and hairspring, a tuning fork or a piezo‑electric quartz crystal. They are often equipped with a striking … centre‑seconds clocks; electronic clocks; piezo‑electric quartz crystal clocks. The heading also includes clocks for …
… and semi-silica refractories (based upon sand, crushed quartz, flint, etc., and bonded with clay or lime). (4) … Filter plates made from a body containing kieselguhr and quartz ( heading 69.09 ). …
… (2) Gluten bread for diabetics. (3) Unleavened bread or matzos . (4) Crispbread (also known as knäckebrot) , which … types may contain or may be covered with sugar. (7) “Pretzels” , i.e., brittle, glazed and salted crackers made …
… drills as used for cutting discs from sheets of glass, quartz, etc., are classified in this heading if the working … (e.g., sandstone, granite, lava, flint, molasse, dolomite, quartz, trachyte), of agglomerated natural or artificial …
