“stamp fold”的概念、定义、翻译、参考文献-科学参考

单词	stamp fold
释义	stamp fold Encyclopedia 工学集邮品释 stamp fold邮折为一定主题特制的，内贴邮票或插贴相关主题邮品，在封面和封底印有相关文字和（或）图案的折叠式硬纸卡。
随便看	operator algebra operator algebra method operator algorithm operator analysis operator approximation theory operator automorphism operator bounded below operator calculus operator compact implicit scheme operator-convex operator cosine function operator-difference operator-differential operator-differential equation operator domain operator endomorphism operator equation operator ergodic theorem operator extension problem operator function operator gene operator grammar operator group operator homomorphism operator ideal

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