（）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 （）. The picture of the object is not usually displayed on the surface of a cathode ray tube. Bottom blow valves are installed on auxiliary water-tube boilers to （） Which of the following statements concerning fire-tube boilers is correct?（） ____ will be used to blow away the combustion products from the tube surfaces. 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. 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 （）. I like by bus rather than by tube as you can see more. ?The underground system is also known as the Tube, due to the characteristic shape of the subway tunnels. 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（） 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。 rks, ________ of gun powder or flashpowder _______ in a tight paper tube, make the big flash or boom effect 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。 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？