“XSO”是“Ultrapico Expresso Project File”的缩写，意

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“XST”是“Fulford Software Easy Cross Cross Stitch

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“XST”是“X-Tract XML Script”的缩写，意思是“X-Tract

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“XSTEP”是“XStep DWI Maker File”的缩写，意思是“xstep

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“XSU”是“Fortran Libf77 File”的缩写，意思是“Fortran

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“ITV”是“Instructional Telecommunications And Video

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“XSUM”是“Clapack File”的缩写，意思是“快门文件”

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“XSW”是“Milnta APL Transfer Function”的缩写，意思是

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“TLW”是“Transmission Line For Windows”的缩写，意思

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“XT*”是“Crosstalk Related File”的缩写，意思是“串音

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