The China Energy Science Research Institute has developed an instrument to check the colour of gold, which can quickly measure the content of gold and silver ingots, chains, ornaments and placer gold and does not harm...The China Energy Science Research Institute has developed an instrument to check the colour of gold, which can quickly measure the content of gold and silver ingots, chains, ornaments and placer gold and does not harm the objects. It is an ideal apparatus for gold and silver shops and processing departments. Composed of a main machine, a computer and a printer, the instrument shows at once the content through graphs and a print-out of figures. It is easy to operate and highly accurate.展开更多
文摘The China Energy Science Research Institute has developed an instrument to check the colour of gold, which can quickly measure the content of gold and silver ingots, chains, ornaments and placer gold and does not harm the objects. It is an ideal apparatus for gold and silver shops and processing departments. Composed of a main machine, a computer and a printer, the instrument shows at once the content through graphs and a print-out of figures. It is easy to operate and highly accurate.
