These companies have made valuable contributions, of which perhaps the automatic telephone, an instrument which enables a subscriber to call up his " party" directly, without the mediation of " central, " is the most ingenious.

这些公司做出了宝贵的贡献，其中最巧妙的也许是自动电话，一种使用户能够直接呼叫他的“党”而无需“中央”中介的工具。