Computer · Building Materials
पत्थरों की ड्रेसिंग (गढ़ाई) की जाती है:
- 1निर्माण से ठीक पहले
- 2उत्खनन के तीन महीने बाद
- 3सुखाने (seasoning) के बाद
- 4उत्खनन (quarrying) के तुरंत बाद✓
सही उत्तर देखें
उत्खनन (quarrying) के तुरंत बाद
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