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国家标准ＧＢ／Ｔ１３０３．１－１９９８《环氧玻璃布层压板》于１９９９年１０月开始实施，同时代替ＧＢ／Ｔ１３０３－１９７７。该标准是在ＧＢ／Ｔ１３０３－１９９７的基础上修订的。１９７７年３月首次发布以来于１９９８年１２月第一次修订。与原标准相比有如下差异：?
National standards GB / T1303.1-1998 “epoxy glass cloth laminate” in October 1999 began to implement, while replacing GB / T1303-1977. This standard is revised on the basis of GB / T1303-1997. It was first revised in December 1998 since it was first released in March 1977. Compared with the original standard has the following differences:?