“two step mining”的概念、定义、翻译、参考文献-科学参考

单词	two step mining
释义	two step mining Encyclopedia 工学回采工艺释 two step mining两步骤回采在回采过程中，将采区或矿块划分为矿房和矿柱，第一步骤回采矿房，第二步骤回采矿柱的回采方式。
随便看	involute conical gear involute cylindrical gear drive involute cylindrical gear reducer involute helicoid involute of a circle involute of a curve involute of evolute involute planetary reducer with small difference between the numbers of teeth involution involution algebra involutional system involution axioms involution condition involution curve involution form involution net involution of a composition algebra involution of a division ring involution of a group involution of an algebra involution of a ring involution of forms involution of lines involution of planes involution of points

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。