The cusp balance inclination of tradition anatomic occlusal form artificial teeth is convex, which is a disadvantage factor to set up stable and unhindered chew course.
These questions not only affect part-time faculty to play their own advantages and potential, but also has many disadvantage factors to the development of secondary vocational schools.
The paper expounded the disadvantage factors of filling clay in road bed and the charateristics of clay mixed with ashes.
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