（）接头用于Tube管和Tube管之间的连接。

Fusible plugs are installed in fire-tube boilers to （）. fallopian tube是指输卵管。 Waterside scale in a fire-tube boiler may cause （）. Fins are installed on the generating tube surfaces in waste heat boilers to （）. Bottom blow valves are installed on auxiliary water-tube boilers to （） Which of the following statements concerning fire-tube boilers is correct?（） The picture of the object is not usually displayed on the surface of a cathode ray tube. The tube voltage of high-kV photography should be higher than（） The picture of the object is not usually displayed on the surface of a cathode ray tube. ____ will be used to blow away the combustion products from the tube surfaces. What concern will the test-tube baby raise according to the passage? The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）. ?The underground system is also known as the Tube, due to the characteristic shape of the subway tunnels. I like by bus rather than by tube as you can see more. 适用于管接头连接的胶管按压力分（）类。 液压系统元件中橡胶管和塑料管主要用于固定元件之间的管道连接（） rks, ________ of gun powder or flashpowder _______ in a tight paper tube, make the big flash or boom effect JDG管的管与管的连接采用专用管接头，并将接头紧定螺丝拧断即可。 在线分析仪表和样品处理系统中使用的tube有哪些类型和规格？ 高压胶管端部接头分胶管连接部分和施工管线连接两部分。