首页>
外国专利>
Composite part is composed of a refractory metal, such as tungsten, molybdenum and tantalum or of carbon or graphite and the other hand, of a ceramic material, for example, of beryllium oxide
Composite part is composed of a refractory metal, such as tungsten, molybdenum and tantalum or of carbon or graphite and the other hand, of a ceramic material, for example, of beryllium oxide
