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...
重金属音乐真正形成于60年代后期。Heavy Metal music really arose in the late 60s.年轻人正在形成毒品有好坏之分的观念。Young people are picking up ideas about good drugs and bad drugs.这些分子链彼此缠绕,形成缆线状的结构。These strands of molecules twine around each other to ...