A new torque identification strategy of valve electric actuator is proposed.提出一种新型阀门电动装置力矩辨识方法.The abnormality mitral stenosis was in myocardium, not in the valve.二尖瓣狭窄的病变是在心肌而不是在瓣膜.Intracardiac tumors or ball - valve th...
Impact of monsoon circulations on the upper troposphere and lower stratosphere.季风环流对对流层上部和平流层下部的影响.Most of the chlorofluoromethanes reside in the lower stratosphere.大多数氯氟甲烷存留在平流层下部.Man – made CFCs are the main cause of o...