पिघली हुई धातु का उपयोग मुख्य रूप से निम्नलिखित में से किस निर्माण प्रक्रिया में किया जाता है?

Which among the following is not a Powder Bed Fusion (PBF) additive manufacturing process?

Which among the following non-traditional machining processes is least suitable for producing deep, intricate internal geometries or cavities with precise square corners?