For tile work, a very thin mortar called grout is used.制瓦使用的是一种叫做薄泥浆的很薄的砂浆.The grout is a cement and sodium silicate double grout.土质为细砂和砂质土,浆液为水泥—水玻璃双液浆.There are many micro - cracks between the stones and the ossified c...
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...