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石油裂化管冷拔的四种方法
目前冷拔石油裂化管采用的冷拔方法有:长芯棒拔制、短顶头拔制、空拔和扩拔四种。
YI.ZHANGXINBANGBAZHI
长芯棒拔制是将管料套于长芯棒上,然后同长芯棒一起拉过拔管模,石油裂化管在芯棒与模孔所组成的环状孔型中获得减径和壁厚压缩。
ER.DUANDINGTOUBAZHI
DUANDINGTOUBAZHISHIJIANGGUANLIAOLAGUOBAGUANMO,SHIQIZAIMOKONGYUGUDINGDEDINGTOUSUOZUCHENGDEHUANXINGKONGXINGZHONGHUODEJIANJINGHEJIANBI。
SAN.WUDINGTOUBAZHI
众鑫棋牌下载 SHIGUANLIAOTONGGUOBAGUANMOJINXINGKONGXINYASUO,ZHIJINGJIANXIAO,BIHOUQUEYOUSUOZENGJIA,QIZENGJIALIANGSUISHIYOULIEHUAGUANCHICUNERYI,YIBANWEIZHIJINGYASUOLIANGDE1%,DANDANGGUANLIAONEIJINGXIAOYUERWEIBIHOUSHI,BIHOUJIANGJIANBO。
SI.KUOBA
YOULIANGZHONGFANGSHI,YIWEIYASUOFA:YIWEIQIANYINFA,ERZHEGEYOUYOUQUEDIAN。HOUZHEKUOJINGLIANGJIAODA,QIEBUYICHANSHENGWANQU,DANZAIKUOJINGQIANXUJINXINGGUANDUANJUANBIAN,ZENGJIALEJINSHUXIAOHAO;QIANZHEJINYONGYUHOUBIGUANDEKUOJING。