According to the history of junk bond in American, and extrusion effect showing in Japan and Korea corporate bond market,this paper thinks that it is worth optimizing the issue order of different corporate bonds, innovating the mo.

By using "the law of connected vessels" in Physics, we consider that there are a kind of absorption effect and a kind of extrusion effect in personnel flow between society and government.

According to the characteristic of contact and lubrication of double enveloping hourglass worm gearing,a simplified contact model that can simulate the lubrication mechanism of coupling effect of squeezing effect and entraining effect of this worm gearing is presented.

the simplified contact form that can simulate the lubrication mechanism of coupling effect of squeezing effect and entraining effect of this worm gearing is presented.

To reveal the squeezing effect on hydro-viscous drive speed regulating start,by using finite element method,the modified transient Reynolds equation,energy equation and temperature-viscosity equation were solved simultaneously to simulate transient behavior of hydro-viscous drive speed regulating start.

This article is meant to point out the working procession and the structure of the pounding head,mainly analysis the extruding principle of pounding head in pneumatic impact puncher,when it is working underground.

This article is meant to point out the working procession and the structure of the pounding head, mainly analysis the extruding principle of pounding head in pneumatic impact puncher, when it is working underground.

Based on azimuthal distribuhon analysis, a new type of analysis is presentedto measured the squeeze-out quantitatively.