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emmigrant mail files
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emmigrant mail files
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中华民国时期档案管理
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emmigrant mail files
侨批档案
华侨华人通过民间渠道及金融、邮政机构寄给国内家乡眷属书信与汇款的合称。又称银信。
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ultrapower
ultra-precision cutting of single crystal brittle material assisted with ion implantation
ultra-precision cutting of surface-modified carbon steel
ultra-precision grinding of brittle materials
ultra-precision machining
ultra-precision machining of optical spherical and freeform surface
ultra-precision manufacturing of optical surfaces
ultra-precision mechatronics system
ultra-precision opto-mechanical system
ultraproduct
ultraproduct technique
ultraproduct theorem
ultra-pure materials
ultrapure water
ultrapurification of materials
ultraradical
ultrarapid lens
ultraray
ultrarays
ultra-red
ultraregular space
ultraregular topology
ultrarelativistic
ultra-relativistic electron
ultra-relativistic particle
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