Physics · Environmental Engineering
एक मैनहोल को आमतौर पर गहरे मैनहोल (deep manhole) के रूप में वर्गीकृत किया जाता है, यदि इसकी गहराई किससे अधिक हो?
- 11.2 मीटर
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- 33.0 मीटर
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सही उत्तर देखें
1.5 मीटर
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