Almost every Zseries of trains is equipped with soft sleeper, soft seat, hard sleeper and hard seat.
几乎所有的Z系列列车都设有软卧、软座、硬卧和硬座。
2
Using thermo-simulative experiment method, the abundance of hydrogen and gaseous hydrocarbon in two series (Y and Zseries) of dissolvable or non-dissolvable organic-matter is researched.