Q21F-16C,Q21F-16P,Q21F-16R,Q21F-25C,Q21F-25P,Q21F-25R,外螺纹球阀 Q21F-40C,Q21F-40P,Q21F-40R,Q21F-64C,Q21F-64P, Q21F-16,Q21F-25,Q21F-40,Q21F-64,Q21F-64R, 产品特征 公称压力:1.6-4.0MPa 适用温度范围:-20~232℃~350℃ 适用介质:水、油、气体某些腐蚀性液体