| http://www.w3.org/ns/prov#value | - the filter cover, the hook including a fixing portion extended from the filter cover, a flexible pressing portion bent in a direction approximately 180??? from the fixing portion, and a pair of protrusions disposed at both sides of the flexible pressing portion for engagement with the locking protrusion of the locking hole; and a locking hole having a locking protrusion disposed at the frame plac
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