COMBAX
CERAMIC COMBUSTION BOATS AND BARGES FOR HOLDING METAL SAMPLES; CERAMIC SHIELDS TO COVER SUCH BOATS; AND CERAMIC COMBUSTION TUBES TO CONTAIN SUCH BOATS DURING COMBUSTION; USED IN DETERMINING THE CHEMICAL ELEMENTS OF FERROUS AND NON-FERROUS METALS
Expired · December 7, 1951 · 71622209 ·