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

采用回旋找零技术，确保测试位置的准确无误，因直接驱动失步而造成的错位。

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.

分析室内热水采暖种系统中经常出现的水力失调、热力失调问题，并提出的对策意见。