概述了管道内涂层在国内外的应用现状,详细介绍了内涂层的诸多优点和不同条件下管道内涂敷工艺的技术要点.The application status quo of internal coating gas transmission pipeline at home and abroad is described....
...the link between bacteria, symbiosis, and the evolution of plants and animals.细菌、共生和动植物进化之间的联系nutritive symbiosis营养共生...a symbiosis between monarch and church.君主与教会间的互相依赖关系social symbiosis群居共生...the cosy symbiosis of ...