1.Drum machine changes would result in a null at the punner in an intermediate state.

1.卷筒不推力的保持不兵会导致不满转间状况处单程摆动。

2.The agriculturist, Wang Chen-ho creations of wood for insertion of success, he also invented the punner racks, with a simple machine, increasing the efficiency of the typesetting.

2.了元代，农学家王祯活字成功，他还发明了转排字架，用简单的机械，增加排字的效率。