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

采旋找零技术，确保测试位置的准确无误，避免了因直接驱动步而成的错位。

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.

分析了室内水采暖几种系统中经常出现的水调、调问题，并提出了相应的对策意见。