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WO2019192560A1
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Connection structure of internal thread and traditional thread with asymmetrical bidirectional conical thread having olive-like shape
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WO2019192581A1
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Dumbbell-like asymmetric bidirectional tapered threaded connection pair
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WO2019192579A1
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Bidirectional conical thread technology with technical characteristics of combining circular conical pairs and spirals
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CN105443546A
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Tapered thread bolt body and tapered thread nut
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CN105443543A
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Conical threaded connecting pair
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CN105443542A
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Connecting structure for tapered external thread and threaded hole
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CN105443549A
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Conical internal thread and threaded column connecting structure
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