5 Essential Elements For in tem giá
– Th? Hello?n s? chuyên nghi?p c?a nhà s?n xu?t trong khâu ti?p th? s?n ph?m.
Saturation Stage-The point at which good electron emission with the gun is attained with no shortening the filament existence appreciably.
D?a vào m?c ?ích, c?ng nh? ch?t li?u v