In macroscopical sight, the ideal public transit network should be the excellent combination of public transit hub and line.
从宏观上看，理想的公交网络应该是点和线的最优组合，是由公交枢纽连接着的公交线路纵横交错构成的。
2
Aiming at the technological requirements of tractor wheel hub threading, the electrical and hydraulic control parts for tapping unit combination machine tool were designed.
针对拖拉机轮毂的攻丝工艺的要求，设计了组合攻丝机床的电气与液压控制部分。
3
In fact, the evolving order in Asia is a combination of hub and wheels model, limited co-domination model, normative community model and complex interdependence model.