●蒸汽夹套接头:G1/2'外螺纹●钢球自封压力:≥0.2MPa安装中心距L和标尺刻度L1的关系300500600800L10001200140017002000150350450650H8501050125015501850●蒸汽夹套接头:G1/2'外螺纹●钢球自封压力:≥0.2MPa安装中心距L和标尺刻度L1的关系300500600800L1000120014