螺纹接口 meaning in Chinese

close nipple
source nipple
threaded coupling

A threaded electrical fitting to connect a fixture to an outlet box
螺纹接口用于接合电气装置和引出盒的螺纹接口
E . , . , . radio - frequency connectors ; part 27 : radio - frequency coaxial connectors with screw coupling , typically for use in 75 ohms cable distribution systems type e
射频连接器.第27部分:带有螺纹接口的射频连接器:主要用于75电缆分配系统