m41板牙m58 细牙m475m55m40m44m75x3x2x1m46m54 .m50

m62m65x3x2x1用m475x1丝m44m50 机m46细牙 m54丝锥m55 攻.

螺纹 m6m475通塞规牙精度 测规 .m5 内螺纹6g止 m8x1m8x0 规