البحث
إكتشاف أشخاص جدد وإنشاء اتصالات جديدة وصداقات جديدة
a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier
a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier
a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier
a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier
a detector consisting of a fine wire in contact with a galena crystal; acts as a rectifier