recession direction是什么意思

用法例句

Development of recycle and trapping of CO_2;

CO_2的回收和捕集技术进展

Study on properties of hydrogen storage alloy recycled by a new method;

新法回收废储氢合金性能的研究

Study of Recycle of Wasted PS Foam;

回收废聚苯乙烯泡沫的研究

Improvement of CO_2 Recycling and Cooling System;

CO_2回收冷却系统的改进

The technology of complex tower and its application in the recycling of hydrogen chloride;

组合塔技术及其在回收氯化氢中的应用

Research of reclaiming calcium oxide from carbide residue;

电石渣中氧化钙的回收初探

The Reclaim of Indium from the Course of Nonferrous Metallurgy;

有色冶金过程中铟的回收

Deep Treatment Technology of Crude Oil Reclaimed From Tank Bottom Oily Sludge Rich in Oil;

自高含油罐底油泥回收原油的深度处理技术

Ethanol recovery from auto-catalyzed ethanol pulping of aspen by distillation;

蒸馏回收杨木自催化乙醇法蒸煮废液中乙醇溶液

The application of two-stage compression technology in the recovery of vinyl chloride;

二级压缩技术在回收氯乙烯中的应用

Study on recovery iodine from wet-process phosphoric acid by solvent flotation;

溶剂浮选法回收湿法磷酸中碘的研究

On Improving Sulphur Recovery and Recovering Copper from Pyrite Concentrate;

提高硫回收率与回收硫精矿中铜的探讨

The research and application of recovery method to recover dip entry coal column;

采区下山煤柱回收方法的研究与应用

Recycling alkaline corrosion solution and recovering aluminium;

铝碱蚀废液再生及铝的回收