| http://www.w3.org/ns/prov#value | - In order to attain the above and other advantages, there is provided a method of filling a flow passage inside a liquid droplet ejection head with a function liquid, comprising the steps of: sending under pressure the function liquid for filling into the flow passage inside the liquid droplet ejection head; and thereafter sucking the function liquid out of a nozzle of the liquid droplet ejection h
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