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Conclusions The focal lesion keratectomy with amniotic membrane transplantation is a valuable method fo...

结论病联合多层羊移植是一种溃疡有效的方法。

This paper introduces the light gaso line etherify technology,brings fo rward the project of building the light gasoline etherify device on th e catalyst cracking cell in the refin ery plant.

介绍了轻汽油醚化技术,提出了在炼油厂催化裂化单元建设轻汽油醚化装置的方案。