惠氏螺紋 ( Whitworth thread ) 的螺紋角為 55°
(B)惠氏螺紋角為55°
2. 螺紋的螺紋角,下列何者不正確? (A) 公制梯形螺紋 ( trapez..-阿摩線上測驗
This is a large modal.