OM

laboratory equipment made of translucent quartz glass for use in the chemical, electronic, and semiconductor industries, namely, cells, crucibles, trays bowls, taper-ground joints, belljars, flanges, boats, catalyst carriers [ ; and products made of translucent quartz glass for optical devices, namely, plates, optical filters, and mirror plates ]

translucent fused quartz; semifinished quartz building products, namely, [ tubes, rods, ] plates, and blocks all such products made of translucent quartz glass