| 1 | The gaussian distribution is the familiar bell-shaped curve. | |
| 2 | The structure and operating principle for two kinds of new type removable bell type induction heating furnace have been described. | |
| 3 | Production range: lamp decoration glass--- candle cup, candleholder, candle kettle, round ball, lampshade, clock shade; | |
| 4 | It is much more effective than a bell jar type for operation such as adjustment of film thickness, exchange of sampler and cleaning. | |
| 5 | The technical re formation of bell-type pressurized sintering furnace forfabricating powder metallurgy friction materials is reviewed. |
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