螺絲攻牙鑽孔徑對照表公制粗螺紋公制細螺紋標準徑11.00 11.50 12.50 13.00 13.50 ... 32.752 34.210 33.835 34.676 34.376 美制迫牙絲攻鑽孔規格外徑精度G5 G4 ...
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