Decal gi?y ???c thi?t k? và in ?n v?i nhi?u ??c ?i?m, kích th??c khác nhau In decal cu?nChilly finger-A lengthy copper rod extending alongside The within in the electron column. When its reservoir is saved stuffed with liquid nitrogen, the rod attracts contaminants that might or else degrade the chamber's vacuum.Tuy nhiên vi?c Iin nhãn giá s?