短語詞組短語focal aperture spot 焦斑focal l spot 焦點;焦斑focal aperture spot diameter 焦斑直徑nominal focal spot value [特醫(yī)]焦點標稱值;焦點標稱值focal spot tracking 解釋project focal spot 投射焦點thermal focal spot 熱焦斑large focal spot 大焦點;大斑焦 返回 focal spot