1.对具有代表性行业的262个工种劳动工时和能量代谢进行了调查研究,结果表明我国现行工业生产中一个劳动日净劳动时间长短各异,最少为1小时多,最多几乎没有休息,平均劳动时间率为68.2％,即净劳动时间为326.4分钟(相当于5.44小时),一般来说,重工业劳动工时较短,如炼钢,轧钢工种等;轻工业劳动工时较长,如印刷, 1. A survey of 262 work-hours and energy metabolism in representative industries shows that the net working hours of one day of labor in China’s current industrial production are different at least for more than one hour, with a minimum of rest at most, with an average of The labor hour rate is 68.2%, that is, the net working time is 326.4 minutes (equivalent to 5.44 hours). Generally speaking, heavy-industry labor hours are short, such as steelmaking and rolling workers. For light-industry workers, working hours are longer such as printing,