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请教 .fab 和.ucm 后缀文件是做什么用的

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.fab文件里有很多类似下面的内容
S!JU20!IC!PACKAGE!SHT0805_55R!NO!90.000!150.0!3125.0!JMPR2NC!
S!JU17!IC!PACKAGE!SHT0805_55R!NO!90.000!775.0!3225.0!JMPR2NC!
S!JU21!IC!PACKAGE!SHT0805_55R!NO!90.000!1450.0!3100.0!JMPR2NC!
S!JU18!IC!PACKAGE!SHT0805_55R!NO!90.000!875.0!3225.0!JMPR2NC!
S!JU12!IC!PACKAGE!SHT0805_55R!NO!90.000!300.0!3475.0!JMPR2NC!
S!JU13!IC!PACKAGE!SHT0805_55R!NO!90.000!400.0!3475.0!JMPR2NC!
S!JU16!IC!PACKAGE!SHT0805_55R!NO!90.000!675.0!3225.0!JMPR2NC!
S!JU19!IC!PACKAGE!SHT0805_55R!NO!270.000!25.0!3125.0!JMPR2NC!
S!JU33!IC!PACKAGE!SHT0805_12R!NO!180.000!-2800.0!-100.0!JMPR2NC!
S!JU30!IC!PACKAGE!SHT0805_12R!NO!90.000!-3125.0!375.0!JMPR2NC!
S!JU31!IC!PACKAGE!SHT0805_12R!NO!90.000!-2825.0!400.0!JMPR2NC!
S!JU26!IC!PACKAGE!SHT0805_12R!NO!0.000!-2825.0!650.0!JMPR2NC!
.ucm里有很多类似下面的内容
S!ETCH!BOTTOM!LINE!-170.2!-445.8!-147.0!-469.0!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-170.2!-705.0!-170.2!-767.8!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-170.2!-767.8!-149.0!-789.0!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-1862.0!-49.0!-1862.0!-63.0!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-1897.0!-14.0!-1862.0!-49.0!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-1925.0!-14.0!-1897.0!-14.0!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-1948.0!-37.0!-1925.0!-14.0!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-1990.0!-37.0!-1948.0!-37.0!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-201.7!-285.7!-169.0!-253.0!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-201.7!-345.0!-201.7!-285.7!7.0!CONNECT!
S!ETCH!BOTTOM!LINE!-516.8!-705.0!-516.8!-817.8!7.0!CONNECT!
请帮忙解答谢谢

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