connect up
6.This design requires P43 rail pinning up the line. The speed should be with 15km. However, actually, in the uphill sector when curve radius R= 500 and the gradient I= 1.2%, the speed should be no less than 45km, therefore, we should adopt the P36 steel I-beam in the carling construction instead of the P43 rail to connect and pin up the construction.
9.Intelligent telephone terminal is a multifunctional device that can record messages,automatically answer calls,manage personal information and connect to the Internet via dial-up line.


