| 摘要 |
<p>Modular supports made of PVC channels are used for the components of a kit for teaching assembly of automatic equipment or system instruments. Specifically the channel pieces are of 60x40 mm. cross-section and 40 mm. long and are drilled to accept switches, lights, electrical contacts, etc. The channels can be mounted inverted on rails on a suitable base board representing e.g., an electromechanical or fluidic control system.</p> |
