直接酸浸 meaning in Chinese

direct acid leaching

A technological investigation of the production of manganese sulfate using soft manganese extract and sulfuric iron ore in sulfuric acid
黄铁矿直接酸浸生产硫酸锰的工艺研究
Research on process of manganese carbonate for soft magnetic ferrite produced by directly acid leaching of soft manganese ore
软锰矿直接酸浸生产软磁铁氧体用碳酸锰的工艺研究