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| 1. | impregnation with ammonia or a compound of ammonia. |
| 用氨水或氨的化合物浸渍物质。 |
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| 2. | the tedious technological process, a new process is proposed to integrate well the heating and drying with |
| 一体式的真空干燥及真空压力浸渍工艺将上述两道工艺合二为一，在同一台真空罐内进行一体式的加热、真空干燥和真空压力浸渍。 |
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| 3. | Impregnation with ammonia or an ammonium compound. |
| 氨化作用用氨或氨化物浸渗 |
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| 4. | Impregnation with calcium or calcium salts, as with calcium carbonate. |
| 钙化掺入钙或钙盐，如用碳酸钙 |
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