push-pull track

It is important to research actuality, rule and existing questions on 'double-track system' engineering bid price in order to reform construction price system in our country, conform with international construction market regulations and push market economy development.

研究双轨制承发包价格的现状、规律和存在的问题，对我国建筑产品价格体制改革与国际建筑市场接轨，推动市场经济的发展有重大意义。

Through analyzing the elite's push-off technique on curved track at 2002 world speed skating championship, it was believed that during the stroke there was an obvious difference in work mode of muscle group between the clap skates and traditional skates.

通过对2002年世界速滑锦标赛优秀运动员弯道蹬冰技术动作的分析后认为，clap式冰刀与传统冰刀蹬冰过程中肌群工作方式存在着明显的不同。

Profile Modeling for Longitudinal Forward Kinematic Track of Push-arm Trunnion of Bulldozer

推土机履带台车架铰点纵前向运动轨迹的仿形