active metal造句怎么写

Different from the traditional active metal brazing, RAB uses a liquid-phase oxide-metal melt at high temperature and the process does not require a vacuum or inert atmosphere.

Zinc is a chemically active metal, but its corrosion products are generally dense and adherent.

In 1932 the Joliot-Curies made a radioactive metal bombard beryllium--which is a non-radio-active metal--with its rays. The result was that the beryllium, too, became radioactive- even more so than the original source of the rays.