| 1 | In chapter three, the problem of the nonlinear dynamical stability of the shallow reticulated conical shell is analyzed. | |
| 2 | In the design process using cone brake cover state and work to achieve a state of interlocking brake. | |
| 3 | A niobium-cobalt-rare earths alloy powder was investigated, which was used to improving combined properties of valve cone surface of internal combustion engine. | |
| 4 | Through analyzing the characteristics of the part, according to drilling hole on the conical surface, designed the special clamping tool. | |
| 5 | Small diameter cone bit positioning deflection by wire-line coring with steel ball supporting was used to solve the problem economically. |
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