Also available with integral metal seats 也可提供整体金属阀座。
2.
Rules for the preparation of detail specifications for rectangular electrical connectors of assessed quality with integral metal housings for d . c . and low frequency applications - full and basic assessment levels 直流和低频用经质量评估的整体金属壳矩形电气连接器详细规范的制定规则.全面和基本评估级