@rui.li821: Every transformer oil‑tank undergoes full quality inspection before shipment. Weld check, sand‑blasting surface review, dimension test, leakage test and coating inspection. Strict quality control helps to avoid oil‑leakage and rust problems. Contact us via WhatsApp for quotation. #TransformerTank #TransformerManufacturer #QualityControl #FactoryInspection