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DIRECT-ACTING WATER-GAS RATIO GOVERNING DEVICE IN THE OPERATION RANGE DECREASED BY DISTRIBUTION OF WATER AMOUNT, BY ADJUSTING THE SPRING FORCE WITHOUT MOUNTING AND WITH PARTICAL UNBALANCED WATER VALVE FOR GAS-FIRED WATER BOILERS
DIRECT-ACTING WATER-GAS RATIO GOVERNING DEVICE IN THE OPERATION RANGE DECREASED BY DISTRIBUTION OF WATER AMOUNT, BY ADJUSTING THE SPRING FORCE WITHOUT MOUNTING AND WITH PARTICAL UNBALANCED WATER VALVE FOR GAS-FIRED WATER BOILERS
