
BS EN 61240. Piezoelectric devices. Preparation of outline drawings of surface mounted devices (SMD) for frequency control and selection. General rules
出版:British Standards Institution

專家解讀視頻
BS EN 61240. Piezoelectric devices. Preparation of outline drawings of surface mounted devices (SMD) for frequency control and selection. General rules
出版:British Standards Institution
專家解讀視頻