这些设备提供直流电输出信号，它与操作位置成正比。
These devices provide a DC electrical output signal that is proportional to the handle position.
氢燃料电池在催化剂作用下，氢分子解离为氢质子并释放出电子，电子在外电路形成直流电输出电能。
The hydrogen molecule is decomposed into hydrogen proton and set free electron under acting on catalyst. And free electron is formed DC in external circuit to output electric energy.
我可以作一个小小的赛道与直流电动机来衡量的实际输出功率的引擎在不同进气压力。
I may make a small dyno with a DC motor to measure the actual power output of the engine at various intake air pressures.
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