短语词组短语Metal Pall Ring 金属鲍尔环填料;蜂窝陶瓷金属鲍尔环填料plastic pall ring 塑料鲍尔环填料PTFE pall ring 四氟鲍尔环Pall ring packing 碳钢鲍尔环填料Ceramic pall ring 鲍尔环Four Fluorine Pall Ring 四氟鲍尔环填料polypropylene pall ring packing 聚丙烯鲍尔环填料 返回 Pall ring