短语词组短語Metal Pall Ring 金屬鮑爾環填料;蜂窩陶瓷金屬鮑爾環填料plastic pall ring 塑料鮑爾環填料PTFE pall ring 四氟鮑爾環Pall ring packing 碳鋼鮑爾環填料Ceramic pall ring 鮑爾環Four Fluorine Pall Ring 四氟鮑爾環填料polypropylene pall ring packing 聚丙烯鮑爾環填料 返回 Pall ring