英语高手请进There can be many such reinforcing layers in the longi
英语高手请进
There can be many such reinforcing layers in the
longitudinal and the transverse directions.Perfect bond is assumed between the
reinforcing steel layers and the surrounding concrete
There can be many such reinforcing layers in the
longitudinal and the transverse directions.Perfect bond is assumed between the
reinforcing steel layers and the surrounding concrete
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你能帮帮他们吗