basic roof in a sentence

• Function of destruction and instability of basic roof in top coal caving of steep seams
• As a basic roof garden to effect and run the infants ’ education , kindergartens play an important role in the modern infants ’ education theory
• Theory that the sur - hinge - point is pivotal point provides theoretical basis for the filling to prevent the instability of the basic roof
• In order to study basic roof ' s destruction movement that affects working face in horizontal section top coal caving in mining steep seams , this paper analyses tension of roof using elastic and thin board theory and concludes criterion of roof destruction based on long and narrow thin board
• In order to study the basic roof ' s destruction movement that affects working face in horizontal section top coal caving in mining steep seams , this paper analyses tension of roof using elastic and thin board theory and obtains criterion of roof destruction based on long and narrow thin board
• It's difficult to see basic roof in a sentence .