| http://www.w3.org/ns/prov#value | - This invention relates in particular to processes, apparatuses, and valves for dispensing a high puritymaterial from a pressurized vessel by depositing the high purity material on a noncontaminating surface and then transferring it only when a gastight valve is opened to dispense the solid material.Various types of standard valves have been used in the past to dispense gaseous, solid, and liquid m
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