... (beryllium bronze), two materials.Aluminum-copper alloy non-sparking tools is synthesized precious rare metals, smelting ... Ming paint, galvanized chrome-plated V.Manufacturing ProcessProcess of non-sparking tools:Foundry (ingredients - melting - coke casting ... polish - surface treatment - into finished products VI."Non-sparking" Tools’Application"Non-sparking", "spark reduced", "spark-resistant" or ...