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The limitations of this scheme became quite apparent with the introduction of detectors such as the plumbicon, image orthicon and vidicon. 這個(gè)方法的局限性在引進(jìn)諸如氧化鉛光導(dǎo)管攝像管，超正析象和光導(dǎo)攝像管之類的探測(cè)器之后變得很明顯。