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High-Precision Impeller Casting Manufacturer | Factory Direct Shanghai Lierwo specializes in 3D printed molds, resin sand casting, and silica sol investment casting, delivering high-accuracy impeller and pump castings in carbon steel, alloy steel, and stainless steel. ✔ Impeller pump casting specialist ✔ Large-scale & customized production ✔ Strict quality inspection & stable supply 📩 Submit the form to receive drawings review, technical solution & fast quotation.