| http://www.w3.org/ns/prov#value | - providing a hand held powder-fed laser fusion welding torch having a body, a nozzle assembly mounted on the body, the nozzle assembly defining a central nozzle aperture through which gas and light, including laser light, may pass, wherein the nozzle defines first and second powder flow channels aligned with a working focal point adjacent the central nozzle aperture, whereby fusion powder may be tr
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