等长双头螺柱
We excel at Project Management and VMI Management.
Each product will beproduced and delivered on time.
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螺杆
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牙条(全螺纹)
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双头螺距（牙长=1.25D）
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双头螺距（牙长=1D）
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单头螺柱
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六角隔离柱
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等长双头螺柱
