| 摘要 |
The equipment has a rectangular housing which is used to display a public invitation to participate. Traders at a specific location compose questions and texts relevant to the local situation and insert them in panels adjacent to push buttons. Push buttons (A) are linked to a timer (B) which prevents repeated answers to a question from the same person. A computer (C) sums the push button responses which may be reset to zero by the trader using a button (D). A switch (E) and indicator (F) are also included.
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