vb3

代码说明：

  机械加工工时计算器：根据国家标准的机械加工工时计算和工厂实际经验在VB中编制的，已用多年，适于中小工厂。(Machining man-hours calculator: According to national standards machining factory hours worked and actual experience in the preparation of the VB has been used for many years, suitable for small and medium-sized factories.)