To enhance imaging during the TEM a beam alignment must be performed previous to use. A Instrument for this alignment is often a holey grid. A holey grid is a TEM grid guidance coated with a skinny plastic film plus a stabilizing carbon layer.In tem v? t?i Gia Lai in nhanh, decal v? Chan Long, siêu v?, kháng n?ng ch?u m?a dán ngoài tr?i n?ng m?