Patent classifications
G
PHYSICS
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G05
CONTROLLING; REGULATING
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G05D
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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G05D23/12
with sensing element responsive to pressure or volume changes in a confined fluid
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G05D23/125
the sensing element being placed outside a regulating fluid flow
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G05D23/127
to control a gaseous fluid circulation
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