What are these two watches on MIG welding argon bottle? What is reading? vide infra

This is a combination of argon pressure reducer and argon flowmeter, which is usually called argon flowmeter. Among them, the pressure gauge of argon bottle with larger value is actually the gas pressure in the bottle. The argon flowmeter with smaller value is the representative of adjusting argon flow in welding operation. The pressure gauge automatically realizes the air pressure in the gas cylinder without the adjustment of welding personnel; The argon flowmeter adjusts the argon flow in welding operation by adjusting the knob on the argon flowmeter.