An improved photoimagable cationically polymerizable epoxy based solder mask is provided that contains a non-brominated epoxy resin system and from about 0.1 to about 15 parts, by weight per 100 parts of resin system, of a cationic photoinitiator. The non-brominated epoxy-resin system has solids tha.....
[更多]
The system is designed to absorb concentrated solar radiation in a molten eutectic salt. The liquid salt is contained in an insulated crucible with an aperture for entry of concentrated light. The salt serves as a volumetric energy absorber, an energy storage medium, a high temperature heat transfer.....
[更多]
This is a Fermentation process. An anaerobic digestion of organic material. It uses kitchen waster i.e.Food and water.The Compound of two tanks, one floating in the cows storage while one at the bottom in the digester. Methane gas is therefore produced from the process . This pushes the floating tan.....
[更多]
| |<首頁 <-上一頁 下一頁-> 末頁>| |
