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Tel: +44 (0) 20 7863 3077 email: John Harvey

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SJJ System Services Ltd

Service provider

Contact: Catheryn Whitfield

Position: Office Manager

Unit 20 Heads of the Valleys Ind Est

Heol Klockner


Gwent NP22 5RL


Telephone: +44 (0) 1685 840305


Service provider

SJJ System Services carry out Service, Repair, Maintenance, Calibration, Refrigeration Retrofits, Relocations, System Software and Control Upgrades on all makes and models of Temperature/Humidity Test Chambers/Ovens/Walk-in and Drive-in rooms/HALT HASS and Liquid Nitrogen systems. We have a vast knowledge and experience with 157 years service between us. is produced by Concorde Publishing Ltd.

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