This paper deals with comprehensively moisture transfer mechanism, theoretical model in concrete in different ambient conditions and the latest research progress.
综合论述了混凝土在不同环境条件下水分迁移机理与理论模型，以及国外在该领域的最新研究进展。
Parameters of butt fusion welding of plastic pressure-pipe are different for varying pipe diameters and ambient conditions, and it is also affected by personal factor.
塑料压力管道热熔对接焊的工艺参数随管道尺寸和环境条件的不同而不同，同时还受人为因素的影响。
Parameters of butt fusion welding of plastic pressure-pipe are different for varying pipe diameters and ambient conditions, and it is also affected by personal factor.
塑料压力管道热熔对接焊的工艺参数随管道尺寸和环境条件的不同而不同，同时还受人为因素的影响。
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