题目内容
钢网的清洗频率与引脚间距有关系，引脚间距越小，清晰频率应该越高。
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进行模板与PCB对准的是印刷机定位系统的功能。
印刷机的自动清洁装置主要用于清除网板孔中的残留焊膏，保证印刷质量。
目前对印制精度的要求是根据印制板组装密度和元器件引脚间距的最小尺寸决定，一般要求达到±0.025 mm
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