Computer · Geotechnical Engineering
बोल्डर (विशाल पत्थरों) वाले हिमनदीय टिल (Glacial Tills) में उपयोग के लिए निम्नलिखित में से कौन सी ड्रिलिंग विधि अधिक उपयुक्त है?
- 1कोर ड्रिलिंग (Core drilling)
- 2वाश बोरिंग (Wash boring)
- 3रोटरी ड्रिलिंग (Rotary drilling)
- 4परकशन बोरिंग (Percussion boring)✓
सही उत्तर देखें
परकशन बोरिंग (Percussion boring)
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