| 摘要 |
The laboratory bench worktop (8) has an aperture to receive a recessed container holding a control unit (9) and an electric heater (12) e.g. for heating test-tubes, flasks or other apparatus. The container has an outer rim that rests on the worktop, and when the heater is not in use it can be removed and replaced by a flat cover. The container has a hole (11) in the bottom for an electrical cable, and both container and cover are made from a suitable stainless or coated material
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