However in the welding industry we used to use an 'impulse changeover relay' to control the direction of a dc motor used to oscillate a welding head between mechanical end stops.
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impulse changeover relay
脉冲转换继电器
以上为机器翻译结果，长、整句建议使用 人工翻译 。
应用推荐
模块上移
模块下移
不移动