拡張部分

かくちょうぶぶん

noun

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extension(computer term)

拡	broaden, extend, expand, enlarge
張	lengthen, counter for bows & stringed instruments, stretch, spread, put up (tent)
部	section, bureau, dept, class, copy, part, portion, counter for copies of a newspaper or magazine
分	part, minute of time, segment, share, degree, one's lot, duty, understand, know, rate, 1%, chances, shaku/100