搜索结果: 1-1 共查到“劳动科学 making heating”相关记录1条 . 查询时间(0.093 秒)
Productivity in making heating and cooling equipment
cooling equipment making heating export sales
2009/5/31
Output per hour rose rapidly during 1967-73, reflecting brisk demand; output tended to stagnate after 1973, but was shored up by orders for energy-efficient equipment and by export sales.