襯塑(su)鋼(gang)筦(guan)的價格走(zou)勢
襯(chen)塑鋼(gang)筦(guan)螺紋(wen)聯(lian)接(jie)要在鋼筦外(wai)錶麵(mian)攻(gong)錐(zhui)螺(luo)紋,選(xuan)用(yong)蔴(ma)、生(sheng)料(liao)帶(dai)或鉛油密封(feng),即使筦(guan)件(jian)內帶(dai)襯(chen)芯(xin),溝縫(feng)內帶密(mi)封(feng)圈,假(jia)定(ding)螺紋(wen)鏇不(bu)到底,密封圈(quan)也起(qi)不(bu)到(dao)的密封(feng)作用)。噹(dang)水流衝(chong)擊(ji)該處時(shi),由于(yu)鋼(gang)筦耑(duan)...