Up to the 70s of last century, the hollow cylindrical roller bearing is usually applied in railway locomotives and all kinds of machine tools by the formal Soviet Union and USA.
原苏联和美国在上个世纪70年代才比较多的将空心滚动体轴承应用于铁路机车车辆和各种机床上。
Compared with the present, "information surplus", mentioned by communication scholars in the 70s of last century, is just a warm-up exercises.
与现在相比上世纪70年代传播学界所提到的“信息过剩”只是个热身运动而已。
Even if inflation and devaluation of USD are considered, international oil price in 2007 is seemly equivalent to the price during oil Crisis in the 70s at the last century.
即使考虑到通胀和美元贬值因素，2007年国际油价也已和上世纪70年代石油危机时期的价格不相上下。
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