1.Adopt gyral zero-finding technology to ensure the correction of detected part and avoid the。dislocation resulted from the stepout of direct drive.

1.采用回旋找零技术，确保测试位置的准确无误，避免接驱动失步而成的错位。

2.Based on analyzing hydraulic stepout and heating power stepout took place in hot water heating system indoor, the improvement plan is presented in this paper.

2.分析热水采暖几种系统中经常出现的水力失调、热力失调问题，并提出相应的对策意见。