1. Place the preform site must be flat. 2. Before prefabricated mold release agent must rub or releasing oil .. 3. The mold must be placed flat equipped with concrete .. 4. In the following four degrees prefabricated prohibited .. 5. After stripping temporarily do not have to be placed in the mold clean up and tidy. To prevent deformation .. 6. When stripping percussion instruments used must be wood or leather hammer hammer .. 7. use when stripping stripping or sheet or mat underneath sacks of straw bags or tires, to prevent damage to the preform and the mold. 8 on a vibrating platform to regularly clean and maintain smooth, clean when knock. 9. When large prefabricated components, if used directly on the ground when the mold vibrator, vibrator head must put the holster, it may reduce mold life. 10. When large prefabricated components or heavy components easily deformed, it is recommended to use a good clip board or use clips or iron frame of mind to do. 11. When the temperature is higher in the summer must be covered with prefabricated straw bags or sacks or shade net, to prevent sun crack precast and sprinkler maintenance schedule. 12. The need to do pre-perforated pipe used blocks must be promptly withdrawn, put just pumping out a long time. 13. On a bad mold clean up sticky cement, prohibit the use of iron tools to clean, it is recommended with dilute hydrochloric acid or oxalic acid Qin bubble, with a soft cloth after cleaning. 

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