提出胶管组合件的设计参数和要点.The designing parameters and the main points are offered.NBR胶板, 胶条,胶管, 胶棒. 硅胶板,条, 管.NBR sheet Plastic strips, hoses, Jiaobang . Silica gel plates, of the tube.将放喷和压井胶管与伸缩节连通.Connect the choke and kill lin...
Bob had to touch up the exterior paintwork where it was necessary.鲍勃要给所有外表需要修饰的地方上油漆.Covert action was deniable; a Pentagon program would not be ( Bob Woodward )偷偷摸摸的行动是可以否认的; 而五角大楼的行动却是有目共睹的 ( 鲍勃伍德沃德 )Bob died of a hear...