– Th? hi?n s? chuyên nghi?p c?a nhà s?n xu?t trong khâu ti?p th? s?n ph?m.Though diffraction could be beneficial, diffraction of electron waves around the aperture openings can interfere Using the initial wave entrance.The 2nd anode (Anode 2) accelerates the electrons to the required accelerating voltage. No Wehnelt cylinder is needed as the t