一个罗盘显示的程序，可以修改参数调整指针的灵敏度。-A compass shows the procedure can modify the parameters to adjust the sensitivity of indicators.

DP/PA coupler的详细资料，通过该文可以对coupler的技术指标有清楚认识，对自主开发coupler有帮助-DP/PA coupler detailed information, the adoption of the text of the coupler can have a clear understanding of technical indicators, the development of self-help coupler