Wirings of the poly layer are always utilized under the silicon grid technics . to control the macro - cell signal delay and improve signal integrality , the crossing among different nets must be averagely distributed to reduce the number of layer permutation . the metal layer wirings should be maximized and the length of poly layer wiring in each net should be minimized 硅栅工艺晶体管级布线利用多晶层走线，为了控制宏单元时延性能及改善信号完整性形态，关键是不同线网间交叉的均衡分配以减少走线的换层次数，最大化金属层走线以及每一线网多晶层走线长度的有效控制。
A model of letting out of no oil ubricated double whirlpools vortex air compressor was set up , the length of leak line of one cycle was calculated the change of the leak line at work , the change of the length of leak line varying with the crank corner , and the change of the leak amount varying with the pressure of revealing atmospheric and crank corner were analyzed 摘要建立了无油润滑双涡圈涡旋压缩机的泄露模型，根据型线的几何理论计算了一个周期内泄漏线的长度，分析了在工作过程中泄漏线的变化，泄漏线长度随曲柄转角的变化，以及泄露量随排气压力，曲柄转角的变代情况。
