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发明名称
CHEMICAL PREHEATER FOR OIL WELL DRILL
摘要
申请公布号
AU588243(B2)
申请公布日期
1989.09.14
申请号
AU19850044473
申请日期
1985.07.02
申请人
HOT-HED INC.
发明人
LOUIS J. WARDLAW
分类号
B23K9/02;B23K9/235;E21B33/04;E21B36/00;(IPC1-7):F24J1/00;B23K5/213;B23K11/34
主分类号
B23K9/02
代理机构
代理人
主权项
地址
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