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ZJ40LDB-J,4000m oil drilling,1000HP drilling
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ZJ40LDB,4000m oil drilling,1000HP drilling r
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ZJ30LDB,3000m oil drilling,750HP drilling ri
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ZJ70LDB,7000m oil drilling,2000HP drilling r
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ZJ40LDB,4000m oil drilling,1000HP drilling r
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ZJ30LDB-J,3000m oil drilling,750HP drilling
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ZJ90LDB,9000m oil drilling,4200HP drilling r
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ZJ70LDB-J,7000m oil drilling,2000HP drilling