midspan的意思？

midspan的音标：midspan的英式发音音标为：['mɪdspæn]midspan的美式发音音标为：['mɪdspæn]...

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...