One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 497
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Multiple-choice question: In the design of safety technologies for calcium carbide crushing belt systems, the belt-driven equipment must be equipped with comprehensive safety features. These features include ( ). A. Safety protection devices B. Safety control devices C. Safety alarm signal devices D. Safety monitoring devices Answer: ABC
In the design of safety technologies for calcium carbide crushing belt systems, the belt-driven equipment must be equipped with comprehensive safety features, which include (ABCD): A. Safety protection devices, B. Safety control devices, C. Safety alarm signal devices, D. Safety monitoring devices