Different body materials and seal ringcompound folder layer are suitable for different medium.
更换阀体材质和密封圈复合夹层可适用不同介质。
2
PCB (polychlorinated biphenyl) : Any of a class of highly stable organic compounds prepared by the reaction of chlorine with biphenyl, a two-ringcompound.
多氯联苯：任何一种由氯与联苯反应生成的非常稳定的二环有机化合物。
3
Used AgNO3 Standard solution to measure the content of mercapto heterogeneous ringcompound and thioureido derivative in acid coppering gloss agent continuously by potentiometric titration.