Actually, these parents tend to be having a set of nanny-cams installed throughout the residence to best track the nanny and to record (literally) what she does or does not due when on duty.
Along this line 20,000-ton coal trains can reach a length of over 7 km pulled by powerful electric locomotives over an extra heavy dutytrack and driving down operating costs.
大秦线上运行的两万吨运煤列车长度可达7公里，由大功率电力机车牵引，大大降低了运营成本。
3
Heavy duty extruded aluminum track and bracket system.