... . stainless steel spiders,curtain walls spider Casting: investment casting ,precision casting, lost wax casting ,soluble glass process complex shell process ... , machining, turning, milling, drilling, thread cutting.Surface treatment: glass rays electrolytic polishing, coating, varnishing, bromzing. Passivating, grinding, polishingAnalysis ... to ISO 9001 2001 stainless steel spiders,curtain walls spider