High viscosity pre gelatinized starch is widely used in feed, casting, oil drilling, corrugated boxes, building materials and other industries.
高粘度预糊化淀粉广泛应用于饲料、铸造、石油钻井、瓦楞纸箱、建材涂料等行业。
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This paper introduces the repair welding procedure for repairing an alumal casting piece of an oil pump cylinder, This method covers the shortages of AC argon arc weld and gas welding.