1. Objective: The technology of Astragal us Injection was selected through experiment study.

2. The X-ray exhibition and clinic of astragal putrescence of 9 cases were analysed.

3. The astragal putrescence may be disassembled into three stage: putrescence stage, evolve stage and resume stage.

4. Methods: The X - ray exhibition and clinic of astragal putrescence of 9 cases were analysed.

5. Main Products: Door Bottom , Door Sweeps , Weatherstripping , ALUM Threshold , T - Astragal, Substrate , Hinge etc.

6. This method can provide reliable indexes for the content determination of astragal preparations.

7. Objective : To sum up the characteristics of X - ray and clinic for astragal putrescence.