| Aircom Ltd - 50 Green Dragon Lane - HP10 9JZ |
| Compair (UK) Ltd - Broomwade Works - HP13 5SF |
| Compressors & Systems Suppliers Ltd - Cane End La - HP22 5BH |
| Edwards John & Co - Little Acre Farm/Thame Rd - HP27 9QU |
| Garden-Denver Ltd - 51a Wycombe End - HP9 1LX |
| Gardner Denver Ltd. - 51a Wycombe End - HP9 1LX |
| Gast Manufacturing Co Ltd - Beech House - HP10 9SD |
| Siltone (UK) Ltd - Unit 7b/March Pl - HP19 8UG |
| Standardair Ltd - Harleyford Estate - SL7 2DZ |
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