prov:value
| - In a preferred embodiment of the present invention, the workpiece which is to be modified is composed of aluminum, magnesium, copper or one or more aluminum and/or magnesium and/or copper alloys, i.e. it consists of aluminum or one or more alloys or it substantially comprises aluminum or one or more aluminum alloys, for example, in amounts of at least 50, 60, 70, 80, 90, 95 and in particular 99% b
|