Report - TRAPEZOIDAL SCREW THREADS 30度台形ねじFV5－FW10－FY1 EFV（FE）＝0 又は 9,017 FV（FE）≧2 E（V E）≦25の場合 Q FY≦1.0 E（V E）≧26の場合 FY≦2.0 E3≦FW≦20

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