What are the characteristics of good quality automatic feeding and nailing machine?

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Alarm light: When there is an anomaly, automatic light
Vibrating disk: Automatic nail supply, automatic supply, saving time and labor
Linear feeder: Smooth feeding, not easy to card material  
LCD display: Intelligent counting, prevent missing play, can set parameters, alarm function
Vibrating disk regulator: Flexible adjustment of vibrating disk feed speed
Working barometer: Safe and stable air pressure