(第三版)》
每英寸牙数
螺距#DIV/0!
计算最佳三针#DIV/0!
选择三针直径
现有三针直径1.732/1.466/1.443/1.333/1.155/1.128/1.047/1.010/1.008/0.917/0.866/0.
866/0.815/0.733/0.722/0.577/0.462/0.458/0.404/0.289/
