One option for moving toward both biodiversity and terrestrial food supply goals is to produce greater yields from less land, thereby freeing land for conservation purposes.
However, signs are emerging of significant job loss and of growing shortages of productive employment, which are aggravated by the reduction of emigration flows.
The article discusses about open tension control of pay off reel in the continuous galvanizing line and setting the parameter of converters in the PLC to realize the open tension control in detail.
Production practice is an important link in practice teaching of the engineering college, and is a road which must be taken to enhance the synthesizing capacity of theory and practice.