Washi Tape,Stickers Washi Tape,Gilded Washi Tape,Printed Washi Tape Kunshan An De Qing Electric Technology Co., Ltd. , https://www.andeqing.comAmmonia special valve series is for ammonia, liquid ammonia transport special requirements, combined with the actual situation of the domestic valve, the use of novel forms of sealing and reliable design of the seal structure.