The optimal dosage and application method of the expanding agent were proposed based on the results of laboratory experiments and mill trials.
经过试验室和造纸厂的反复应用试验，确定了膨化剂的最佳用量和使用方法。
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Thermal expansion Pipe adopted by two-step pipe mill set for expansion cone-type mold Expanding skills numerals medium-frequency induction heating skills skills in a hydraulic machine.