Layout cleaning personnel, according to ancestral workers cleaningmechanicalcleaning way to restore road health.
布置保洁人员，依照祖先工打扫后机械清洗的方式恢复路面卫生。
2
This aspect is to reduce the pipeline pressure loss, the other is to avoid the path contraction obstacle to the mechanicalcleaning pipelines.
这一方面是为了减小管线的阻力损失，另一方面是为了避免通径收缩后给机械清扫管线造成障碍。
3
Finally, as an applied example, the paper introduces the general design of multi-locations automatic cleaning line for valve parts as well as its mechanical structure and functions.