1) Preconcentration
预先富集
2) preconcentration
预先富集<冶>
3) preemptive
预先
1.
The effect of preemptive Han s acupoint nerve stimulator on postoperative pain in patients undergoing radical mastectomy;
预先韩氏穴位神经刺激对乳腺癌术后镇痛效果的影响
4) pre-existing nuclei
预先形核
1.
The obtained activation energies for the first crystallization is 299±10kJ/mol,with the crystallization kinetics proceeding by a three-dimensional diffusion controlled grain growth on pre-existing nuclei,where n=1.
3,是以预先形核的核心为基础的三维扩散控制生长方式为主;第二个晶化过程为残余非晶中Fe3B的形成过程,其激活能为423±12kJ/mol,Avrami指数为3。
5) preliminary desliming
预先脱泥
6) prescreening
预先筛分
1.
By adding prescreening before secondary crusher,the technical transformation of crushing technology was done in Sanshimudi concentrator.
通过增加中碎前预先筛分,对三十亩地选矿厂碎矿工艺流程进行了有效的技术改造。
参考词条
补充资料：国防科学技术先期技术开发(见国防科学技术预先研究)
国防科学技术先期技术开发(见国防科学技术预先研究)
advanced technology development of national defense science and technology
guomng kexue listiu Xlanqi lishu切ifa国防科学技术元期仪不井汉哗u-vanced teehnology develoPment ofnationalde-fense seienee and teehnology)见国防科学技术预先研究。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。