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螺母公差應(yīng)按照國家標(biāo)準(zhǔn)GB/T 13680-92 執(zhí)行； 螺紋孔與周邊距離偏差不超過 0.5mm (最大）； 螺母兩平面誤差不超過 0.5mm; 螺母周 		2025-05-08
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