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仿印邮票
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仿印邮票
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仿印邮票
邮政部门为集邮展览、集邮活动、集邮品制作等仿照已经停用的早期珍罕邮票,重新制版印制的“邮票”。由于明文宣告是仿印,在其票幅、纸质、刷色、齿孔、暗记等细节上与真邮票有所区别,有的在仿印邮票票背上印有“仿制品”字样。
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method of steps
method of straight lines
method of stratified sampling
method of streamline curvature
method of subdivision
method of substitution
method of successive approximation
method of successive approximations
method of successive division
method of successive elimination
method of successive generations
method of successive iteration
method of successive relaxation
method of successive substitutions
method of summation
method of summation by parts
method of superposition
method of supplementary variables
method of surface of section
Method of Surveying
method of sweeping out
method of symmetrization
method of tangents
method of tax credit
method of tax exemption
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
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