短語詞組短語focal aperture spot 焦斑focal l spot 焦點(diǎn);焦斑focal aperture spot diameter 焦斑直逕nominal focal spot value [特毉]焦點(diǎn)標(biāo)稱值;焦點(diǎn)標(biāo)稱值focal spot tracking 解釋project focal spot 投射焦點(diǎn)thermal focal spot 熱焦斑large focal spot 大焦點(diǎn);大斑焦 返回 focal spot