Key technologies for green food pork production were described in this article,as aspects of business standardization;production equipments and facilities,produ
Myocardium tissue of Kunming mouse embryonic bodies was cultured with the feeder layer of their embryonic fibroblasts in TCM199.The results indicate that some p
Owing to overcoming the characteristics that there are many economic and technical indexes which are fuzzy and incompatibility to each other in evaluating inves
The working principle of radio remote controlling of construction machinery should be that signals of the radio wave from the transmitter obtained in the receiv