From research, it was proved that smelting coal properties were important to COREX process.
经研究得知，熔炼煤的性质对COREX流程的影响至关重要。
By far, research about laser-arc hybrid welding is mostly concentrated on the application and there is still much problem to solve come down to the arc properties and the stability of welding process.
到目前为止，关于激光-电弧复合热源焊接的研究主要集中在应用方面，而涉及到电弧特性及过程稳定性等基础理论，仍有许多问题亟待解决。
The properties, production process and research progress of allantoin are introduced and application of the products is reviewed. The developing prospect is forecasted.
介绍了尿囊素产品的性能、生产工艺及研究进展，并对产品的应用进行了概述，对发展前景进行了展望。
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