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When must safety signs be used?
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What regulations apply to safety signs?
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What types of safety signs are there?
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What is a signboard?
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Why must safety signboards not contain text?
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How will workers understand the meaning of safety signs?
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Can any text be included on a safety sign?
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What is a Supplementary Signboard?
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How will workers understand the meaning of safety signs?
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Do existing safety signs containing text have to be replaced?