3.5K views · 41 reactions | Testo 557 first impression. Do you own a digital manifold set, if so which one? What do you like about it,? What don't you like about it? #testo #digitalmanifold #refrigerant #refrigerantgauges #hvaclife #hvacknowitall #refrigeration #hvac #hvactech Testo Instruments | HVAC Know It All | Facebook
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