专利名称：Improvements in drill pipes申请号：AU1062670申请日：19700123公开号：AU1062670A公开日：19700403
摘要：1,133,743. Pipe joints. BECKER DRILLING (ALBERTA) Ltd. 18 Jan., 1966, No.45712/67. Divided out of 1,133,741. Heading F2G. [Also in Division E1] The subject-matterof this Specification is identical with that described in Specification 1,133,741, but theclaims are concerned with the drill pipe.
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