... ,high water resistant,good sealing effect Company IntroductionSichuan FOREVER Science & Technology Co., Ltd has been engaged in development, production and sale of ... 12068 and the German standard DIN 30672.Sichuan FOREVER Science & Technology Co., Ltd is one of the major suppliers of the ... has been used in National Iran Gas Company (N.I.G.C).Product selection guideJYHT50, JYHT60, JYHT80 JYHT50, JYHT60, ...