About which designs for the force thick plate levels off the backpressure hoop group specially, May achieve the guarantee the stress relieving effect.
特别为强力厚板而设计的上下整平背压滚轮组，可达到保证的应力消除效果。
2
The effect of backpressure on the weight precision in injection molding was investigated via experiments of injecting to air.
通过对空注射方式对影响精密制品质量重复精度之一的背压进行实验和理论研究。
3
Such as operation program, selection of earth pressure, wall-back grouting, rectification of shield machine, which are used to reduce the effect of construction on environment, are analyzed in detail.