词汇	main roof caving
释义	main roof caving 老顶垮落
随便看	transposition of part tendon transposition of peroneus brevis transposition of pterygium transposition of pulmonary veins transposition of radial nerve transposition of standpoint transposition of stator bar transposition of storm transposition of structures transposition of subject transposition of teeth transposition of term transposition of terms transposition of the great arteries Transposition of the great artery transposition of the great vessels transposition of the heart Transposition of thoracic organs Transposition of thoracic viscera Transposition of tooth transposition of unit hydrograph transposition of vessels transposition of viscera transposition or viscera transposition pattern