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n4google.
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xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:248062858
rdf:type
prov:Entity
prov:value
to exhale through the mouthpiece including requiring the individual to exhale with such force as to cause the tube to unroll completely against the biasing action of the spiral spring and to then cause the exhaled breath to escape from the open end of the tube. 4.
prov:wasQuotedFrom
n4:com
Subject Item
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