“pillar extraction”的概念、定义、翻译、参考文献-科学参考

单词	pillar extraction
释义	pillar extraction [`pil·ǝr ik`strak·shǝn] ^{MINING ENGINEERING} Removal of the pillars of coal left over from mining by the pillar-and-stall method. Also known as pillar mining.
随便看	hair hair ball hair cell haircloth hair copper haircord hair cracks hair cycle hair felt hair follicle hair gland hair hygrometer hairline hairpin loop hairpin tube hair pyrites hair salt hairspring hairstone hair trigger hairworm hairy cell leukemia hairy tongue Halacaridae halation

科学参考收录了103327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。