| http://www.w3.org/ns/prov#value | - FIG. 1A is a sectional side view of a preferred embodiment of what those skilled in the art commonly refer to as a double diaphragm spring brake actuator which includes both spring and service brake chambers and incorporates the improvements of the present invention, the power spring being depicted in a fully-compressed state by means of a release bolt, the alternative position of the release bolt
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