题目：
高压清洗机经空负荷运转正常的泵组，可以加压，加压方法为：踏板（），用扳手将溢流阀上螺栓（）拧紧，同时观察出口压力，调至合适压力。
答案：
参考答案：踩下；顺时针
高压清洗机经空负荷运转正常的泵组，可以加压，加压方法为：踏板（），用扳手将溢流阀上螺
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