ground connection joint接地线连接处
ground indicator joint connection磨口连接
ground indicator joint磨光接合
spheric ground glass joint球形磨口玻璃接头
interchangeable ground glass joint可互换玻璃磨口接头
ground in joint磨口接头
conical standard ground joint锥型标准磨口接头
standard ground joint标准磨口接头