Threaded brass inserts shall withstand a direct pull force exceeding 1,500 lbs per insert.
每个螺纹黄铜嵌入件应该经受超过1，500磅的直接拉力。
The chopper control has been widely used in the direct pull govern. Compared with the traditional way of govern, it has a good adjusting capacity, simple operation and economical.
斩波控制广泛应用于直流牵引调速，与传统的调速方法相比较，它调速性能好，操作简单，经济节能。
The chopper control has been widely used in the direct pull govern. Compared with the traditional way of govern, it has a good adjusting capacity, simple operation and economical.
斩波控制广泛应用于直流牵引调速，与传统的调速方法相比较，它调速性能好，操作简单，经济节能。
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