… for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in …
Explanatory notes
… for use in electronics, in the form of discs, wafers or similar forms; chemical compounds doped for use in … of the order of one part per million, provided they are in the form of discs, wafers or similar forms. When in … compounds such as cadmium selenide and sulphide, indium arsenide, etc., containing certain additives (e.g., …