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1971-03-30 |
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Kainan Steel Tube Co |
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1975-04-23 |
1981-06-16 |
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1976-04-22 |
1980-03-11 |
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1976-04-22 |
1981-01-21 |
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1976-07-23 |
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1977-01-03 |
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1978-08-09 |
1983-02-15 |
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1979-07-25 |
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1980-01-19 |
1994-09-20 |
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1980-04-25 |
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1981-07-06 |
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1982-09-20 |
1985-04-02 |
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1982-11-15 |
1987-02-12 |
Quanex Corp |
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1983-01-17 |
1986-02-18 |
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1983-01-17 |
1987-09-30 |
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1983-01-17 |
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1983-04-04 |
1986-02-04 |
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1983-04-26 |
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1983-04-26 |
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1983-04-26 |
1985-08-27 |
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1983-04-29 |
1993-12-07 |
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1983-12-23 |
1986-07-15 |
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1983-12-23 |
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1987-03-23 |
1989-04-18 |
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2002-08-13 |
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1996-05-30 |
Mannesmann Ag |
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2012-11-28 |
2018-01-16 |
Ultra Premium Oilfield Services, Ltd. |
Tubular connection with helically extending torque shoulder
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2012-11-28 |
2017-06-13 |
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Tubular connection with helically extending torque shoulder
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2013-11-22 |
2019-10-01 |
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Brand Gmbh + Co Kg |
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Arcelormittal Tubular Products Luxembourg S.A. |
Threaded connection for pipes, such as oil and gas pipes
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2015-12-09 |
2017-06-20 |
Certus Energy Solutions, Llc |
Tubular coupling
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2015-12-09 |
2022-10-11 |
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Tubular coupling
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2017-03-03 |
2018-09-06 |
Arcelormittal Tubular Products Luxembourg S.A. |
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2017-11-14 |
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Акционерное общество "Первоуральский новотрубный завод" |
Резьбовое соединение нефтепромысловых труб с высоким сопротивлением сжатию и комбинированным нагрузкам (варианты)
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