Stearic acid sealing the hole is better than any other methods of sealing the hole I.
因此，封孔处理是提高涂层防腐蚀性能的重要途径。
Stearic acid sealing the hole is better than any other methods of sealing the hole I.
封孔处理是提高涂层防腐蚀性能的重要途径。
Methods We changed straight pinhead to three-hole pinhead of filling & sealing machine in the work of filling liquid medicine.
方法将灌封机上的直筒药液灌注针头，改为“三孔”针头。
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