The free fluorin content in liquid multi - vitamin was quantitatively analyzed by using a simple potentiometric titration.使用简单的电位滴定法定量分析维生素中游离氟的含量.Single aerosol particles inin winter 2004 were analyzed by proton micropr...
The crack near midspan is more clearly represented by the predicted behavior for stage 1.跨中附近的裂纹用阶段1所预期的特性来表示更为恰当.Excessive midspan lag is one of the main problems of large span prestressed concrete girder bridges.跨中下挠过大...