engineering recuitment PPSC JE Civil Mock Test 2022 Basic Science and Engineering Occupational Safety and Health

नीचे दिखाए गए चेतावनी संकेत को पहचानें।​

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आग का खतरा
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विषाक्त खतरा
3
नाजुक छत
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फोर्कलिफ्ट
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